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	Résolution d'une équation		2010-02-25
		sellin pose la question : Il faut que j'exprime x en fonction de m dans l'équation suivante et je n'y arrive pas: -3x + 1 = (m-1) / 2 * x + (2m + 3) / 5 Claude Tardif lui répond.
	Un système de plusieurs équations et plusieurs inconnues		2009-01-22
		Cédrick pose la question : J'ai un problème écrit à résoudre est-ce que vous pouvez m'aider ? Le premier est le tiers de la somme des deux autres. La somme du premier et du deuxième est 13. Le produit du deuxième et du troisième est 56. Réponse: Le premier nombre est___________________ Le deuxième nombre est _________________ Le troisième nombre est _________________ Pierre-Louis Gagnon, Antoine Letarte at Claude Tardif lui répond.
	Combien d'éleves fréquentent cette école?		2008-04-04
		Jeff pose la question : Une ecole compte sept fois plus d'éleve que d'enseignants et enseignantes .De plus , le nombre de membres du personnel non enseignant correspond a la moitié du nombre d'enseignats et enseignantes . Si l'on tient compte de l'ensemble des éleves , du personnel enseignant et du personnel non enseignante , on dénombre 714 personnes . Combien d'éleves fréquentent cette école? Antoine Letarte lui répond.
	Système à deux équations		2007-12-11
		Fabrice pose la question : un rectangle a 130 m pour périmetre. si on diminue sa longueur de 1 m et on augmente sa largeur de 1 m, l'aire augmentera de 14m². trouver les deux dimentions du rectangle. (on trouvera, au préalable, la difference des deux dimensions) Claude Tardif lui répond.
	Des mots aux équations		2006-11-02
		Julie pose la question : La différence de deux nombres, x et y est de 28. Le nombre y correspond aux huit neuvi�mes du nombre x. Trouvez ces deux nombres. Claude Tardif lui répond.
	P(x+1)-P(x)=x		2005-04-21
		Etienne pose la question : ~P(x)=a x3+ b x2+ c x ~P(x+1)-P(x)=x2 question: trouver les trois nombres a,b et c. Claude Tardif lui répond.
	l'équation d'une rotation dans un graphique cartésien		2001-11-14
		Ghaith pose la question : je d6sir que vous me rafraichissez un peu la mémoire s.v.p. j'aimerai savoir l'équation d'une rotation dans un graphique cartésien merci Claude Tardif lui répond.
	Resolution of the equation f(x)=0		2000-04-01
		Naoufal pose la question : How can i evalf the equation f(x)=0 with f function . Can you ansear me in french thank you very much Claude Tardif lui répond.
	Les equations		1999-12-09
		Enciso Alberto pose la question : j'ai les equations suivantes: X1=Rs + A1/(B+W^2) X2=Rs + A2/(B+W^2) X3=Rd + A3/(B+W^2) X4=Rd + A4/(B+W^2) X5=Rg + A5/(B+W^2) X6=Rg + A6/(B+W^2) dont les coefficients Ai (i=1,2,..) et B sont constants (mais on ne conais pas leur valeur) et Rs, Rd, et Rg sont inconnues. Nous pouvons constater que la dependence de ces differentes expessions en fonction de W^2 est identique. Le tracé de l'une de ces expressions en fonction d'une autre est donc une driote. . . . Claude Tardif lui répond.
	ln(x+3)+ln(x+2)=ln(x+11)		1999-11-24
		Thibault Portevin pose la question : "Résolvez l'équation : ln(x+3)+ln(x+2)=ln(x+11)" Je suis bloqué, pourriez-vous m'aider? Claude Tardif lui répond.
	Gravity equation		1999-10-21
		Jean-Marie Le Ray pose la question : J'ai dû traduire un texte avec la formule "gravity equation", que j'ai rendue par "équation de gravité", sans absolument savoir de quoi il s'agit. Quelqu'un sait-il si cela est juste et ce qu'est exactement une "gravity equation"? Claude Tardif lui répond.
	New pool liner		2021-07-14
		Kareena pose la question : I have a rectangular prism shaped pond that are 4ft by 8ft by 2ft. My pond is lined on the sides and bottom with a pool liner so that it doesn't leak (the top of the pool does NOT have a liner). I am redoing my pool and would like to increase the size of the pond. Each dimension will increase by the same amount, and the size of the pool liner will double. How much I am increasing each dimension of the pond? Give an exact answer and than an approx. answer rounded to the nearest tenth. Penny Nom lui répond.
	A scenario for a linear equation		2021-01-19
		raven pose la question : I have to create a scenario for the following equation y=-1x+45 and then find what each part of the equation represents Penny Nom lui répond.
	Two equations with fractions		2020-10-22
		mia pose la question : I am supposed to look for x and y. my teacher didn't explain very well. please help : (( 2x - y = 5 x/4 + y/3= 2 Penny Nom lui répond.
	2xy = 2x*2y		2020-10-22
		Amber pose la question : Um i am wondering what this equation equals. Thank you for your time and help. 2xy=2x*2y Penny Nom lui répond.
	Simultaneous equations		2020-09-05
		Paa pose la question : a+b=8 a+c=13 b+d=8 c-d=6 find the value of each letter Penny Nom lui répond.
	A word problem involving linear equations		2020-06-22
		Allie pose la question : The length of a rectangular swimming pool is p m and its width is q m. Its given tht the length of the swimming pool is twice its with. if the perimeter of the swimming pool is 150 m, find the values of p and q this is in the chapter linear equations Penny Nom lui répond.
	The flight of a football		2020-05-06
		Michael pose la question : Football is thrown from a 10-yard line. It reaches its highest height of 20 yards. It lands on the 50-yard line after 2 seconds. What is the equation of the parabola that models this throw? I really need help as I've been on this for the longest amount of time. Penny Nom lui répond.
	A system of equations.		2020-04-27
		solomon pose la question : xy + x =28 x + y +4 Penny Nom lui répond.
	A rectangular garde		2020-04-10
		Denise pose la question : In a rectangular garden a person says "if I made that bed 2 feet wider and 3 feet longer it Would have been 64 sq,ft bigger. But if it had been 3 feet wider and two feet longer It would have been 68 sq.ft bigger. What is the length and width of the garden bed? Penny Nom lui répond.
	Setting up a linear equation		2020-04-10
		Jessie pose la question : Michaela and Aleah play on the same basketball team. In one game, Michaela scored one fifth of the teams points and Aleah scored one tenth of the teams points. Together, they scored a total of 42 points. How many points did the team score? I can't figure out how to put together the equation with the given variables. I have to show the work and I also need to know how to make that kind of equation. Thanks! Penny Nom lui répond.
	A linear system		2020-04-02
		Dadzie pose la question : x+s=8→1 y+x=13→2 y-p=6→3 s+p=8→4 Penny Nom lui répond.
	The center and radius of a circle		2020-03-25
		Riley pose la question : so it says find the center and the radius of the below circle x^2+(y-6)^2=121 i need help learning how to solve this Penny Nom lui répond.
	The equation of a line		2020-01-05
		coco pose la question : Good afternoon If relationship between total cost and the number of units made it linear ,and if costs increases by 7$ for each additional unit made ,and if the total cost of 10 units is 180$ . Find the equation of the relationship b/n total cost (Y) & number of unit made (x). Penny Nom lui répond.
	A circle, a point, and a tangent line		2019-12-31
		Faisal pose la question : A circle has radius 10 units and passes through the point (5,-16). The x-axis is a tangent to the circle. Find the possible equations of circle? Penny Nom lui répond.
	The equation of a line		2019-12-10
		Jourdan pose la question : Suppose a mining company will supply 96000 tons of ore per month if the price is 80 dollars per ton but will supply 70500 tons per month if the price is 20 dollars per ton. Assuming the supply function is of the form y = m x + b , find the slope, m and y-intercept, b Penny Nom lui répond.
	Simultaneous equations		2019-10-16
		deepak pose la question : This is too complicated please help me 8/x - 10/y = 1 and x+y=9 Penny Nom lui répond.
	Four less than three times a number is 20		2019-09-29
		Linda pose la question : four less than three times a number is 20,what is the number? Penny Nom lui répond.
	Can one equation with two variables be solved algebraically?		2019-08-30
		Don pose la question : Can one equation with two variables be solved algebraically? Penny Nom lui répond.
	Two linear equations with a fraction		2019-04-26
		Asha pose la question : 2x=-3y …1 x-2+-4/3(y+1) ...2 note: … is equation Harley Weston lui répond.
	Weighing stars and hearts		2019-02-25
		Zach pose la question : Two stars and one heart weigh 38 units. One star and one heart weigh 27 units what is the weight of each? Penny Nom lui répond.
	A linear equation		2019-02-11
		Nick pose la question : What's a linear equation? Penny Nom lui répond.
	Solve for x in Y=1.5x + log (1+x)		2018-12-23
		Asadollah pose la question : Please restate below expression in terms of y Y=1.5x + log (1+x) Thanks Penny Nom lui répond.
	Simultaneous equations with fractions		2018-12-14
		zaheer pose la question : solve simultaneous equations and give answer in fractional form 3x - 2 = 4y +5/3 y + 7 = 2x + 4 would really appreciate some help on this please Penny Nom lui répond.
	A puzzling equation		2018-12-04
		Manny pose la question : Hello, Can you explain why this is wrong: -1 = (-1)^3 = (-1)^{6/2} = ((-1)^6)^{1/2} = (1)^{1/2} = 1 ?? Thank you Penny Nom lui répond.
	A line cuts a curve		2018-11-11
		roxanne pose la question : Hello, i need to ask a question, do you mind explaining and writing the formula of how to solve equations such as "find the set values of k for which the line y-2x-5 cuts the curve y=x^2 +kx+11" please Penny Nom lui répond.
	The point-slope equation for a line		2018-09-23
		Sally pose la question : The equation of the line in point-slope form for the line passing through the point ( 4, -6) and parallel to the line y = -6x + 2. Describe the steps. Penny Nom lui répond.
	Are those two equations the same?		2018-06-05
		Francisco pose la question : Solve for y: 2(x+3)=y x=5 Solve for y: (x+3)2=y x=5 Are those two equations the same? Penny Nom lui répond.
	The mass of a durian		2018-04-14
		REEVASSHINIE pose la question : A watermelon with a mass of 5 kg and two durians with the same mass are placed on an electronic balance.If the reading shown on the balance is m kg,write an expression for the mass of a durian Penny Nom lui répond.
	The intersection of a curve and a line		2018-03-08
		lola pose la question : find the set of values of constant C for which the line y=x+c intersects the curve y=2 square root x at, at two distinct points Penny Nom lui répond.
	The equation of a line		2018-01-23
		Gloria pose la question : Write the equation of a line in standard form through the point (1, 6) and perpendicular to the line 2x –y = 9. Penny Nom lui répond.
	Heat equation		2017-11-23
		Max pose la question : What does du\dt=a(triangle)^2u mean. Can it be solved for t. Penny Nom lui répond.
	An equilateral triangle inscribed in a circle		2017-09-15
		sumit pose la question : what is the area (in sq. unit) of an equilateral triangle inscribed in the circle x^2+y^2-4x-6y-23=0. Penny Nom lui répond.
	Simultaneous equations with fractions		2017-09-09
		Farah pose la question : Hi, my name is Farah. I hope you can help me with this question . X/2 + g/5= 3 and 2g - f = 10 Penny Nom lui répond.
	Simultaneous equations		2017-09-02
		keto pose la question : x-y=2,x^2+xy=12 Penny Nom lui répond.
	The equation of a circle		2017-07-03
		Chen pose la question : Find the center radius and equation of a circle in standard form given the following conditions: 1. Tangent to 3x+2y=0 at the point (0,0) and passing through (1,-1) and (6,0) Penny Nom lui répond.
	Simultaneous equations with fractions		2017-06-02
		Jamal pose la question : 1/x + 1/y =5 and 1/y - 1/x =-1 Penny Nom lui répond.
	Algebra		2017-05-28
		Kerim pose la question : I need to solve this equation. y=at^2 - 2at x =2a√t Express y in terms of x and a Give in the form y=(x^p/ma^3) - (x^q/na) where p,q,m and n are integers Penny Nom lui répond.
	Quadratic Equations		2017-03-28
		Natalie pose la question : Hi Maths Central, I am having trouble with quadratic equations. The question is: Calculate the length 'l' of a rectangular pool by creating and solving a quadratic equation. 1. The rectangular pool is of equal area to a square pool, and a circular pool (5.70m^2). 2. The length of the rectangular pool must be 2m longer than the width 'w'. Thank you so, so much for your help, Maths Central! Penny Nom lui répond.
	Solve 3x^2-19x-14=0 for x		2017-03-15
		nick pose la question : I'm an 8th grader and am quite confused with this equation: 3x^2-19x-14=0 The answer is: -2/3 , 7 But I'm not sure how to solve for it. Penny Nom lui répond.
	Five equations		2017-01-16
		Muhammed pose la question : A x 4 = E B ÷ 4 = E C + 4 = E D - 4 = E ___________ & A + B + C + D = 100 what is the value of E Penny Nom lui répond.
	Form the quadratic equation which has given roots		2017-01-16
		Tharshini pose la question : Given a and B are the roots of the quadratic equation x^2+4x+7=0. Form the quadratic equation which has the roots 3a-1 and 3B-1 Penny Nom lui répond.
	Simultaneous equations with fractions		2016-12-21
		Kimi pose la question : I am stuck on this,can someone please help me???? 1/2x+1/3y=11 8x+2/5y=102 Can someone please explain how to solve questions like these?? Or else I will never learn... Thank you Penny Nom lui répond.
	Joining a fitness center		2016-12-18
		Salem pose la question : A fitness center offers a special price for group-class students. The cost of registration is 30 dollars and then you have to pay 25 dollars per month. What is the rule of the equation in the light of c=---m+----? Penny Nom lui répond.
	Simultaneous equations		2016-11-25
		Rohan pose la question : x-2/3 + y - 1/4 = 13/12 2-x/2 + 3 + y/3 = 11/6 Penny Nom lui répond.
	An equation with fractions		2016-11-09
		Tina pose la question : How do you solve x+1/3=x+2/5. X+1 divided by 3= x+2 divided by 5. What's x= Penny Nom lui répond.
	y = mx + c and Ax + By + C = 0		2016-10-18
		Erick pose la question : please explain to me how to convert an equation from the form y=mx+c to Ax+By+C=o form. Penny Nom lui répond.
	The equation of a line		2016-10-01
		Miriam pose la question : write the equation of the line that passes through (6,7) and is perpendicular to 3x+5y=0 Penny Nom lui répond.
	The equation of a circle		2016-09-30
		Trent pose la question : write the equation of circle B with center B(-2,3) that passes through (1,2) Penny Nom lui répond.
	Two equations		2016-09-17
		Nilesh pose la question : How to solve (x-y)^1/2 + 3(x-y) = 30 ; xy + 3(x-y) = 11? Penny Nom lui répond.
	The equation of a ski slope		2016-08-31
		Hannah pose la question : The information provided is ---A ski slope has a slope of -0.2. You start at an altitude of 10,000ft. Then the question is "Write the equation giving altitude (a) as a function of horizontal distance moved (d). I know this is probably a very simple question but I didn't take a math class my senior year and now I'm a freshman in college, so some of it is very frustrating to me. Any help is much appreciated, thank you! Penny Nom lui répond.
	The dimensions of a rectangle		2016-07-25
		Krunox pose la question : A rectangle is twice as long as it is wide. Its perimeter (the sum of the lengths of its sides) is 60 cm. Find its length and width. Penny Nom lui répond.
	A cubic equation		2016-07-25
		Chinmay pose la question : x³-2x²-7x+5 Penny Nom lui répond.
	The temperature inside and outside a greenhouse		2016-07-22
		Mehzad pose la question : Every day, the temperature in a greenhouse is at its low temperature, 70 degrees Fahrenheit, at 2 a.m. and at its high temperature, 84 degrees Fahrenheit, at 2pm. Its temperature increases linearly between 2 am and 2pm , and decreases linearly from 2 pm and to 2am. The outside temperature follows the same linear patterns, but has a low temperature of 60 degrees Fahrenheit at 2 am and a high temperature of 78 degrees Fahrenheit at 2 pm. At which of the following times will the temperature inside and outside the greenhouse be the same? a) 8:00 am b) 12:00 noon c) 4:00 pm d) The two temperatures will never be the same Penny Nom lui répond.
	Two equations with fractions		2016-07-22
		kanesh pose la question : p/2+q/3=3 p/4+2q/3=3 Penny Nom lui répond.
	An equation involving pi		2016-06-26
		Diaz pose la question : How would you solve : ( pie*X)/ 4 = -pie/2 I have no idea.what to do! Penny Nom lui répond.
	Simultaneous equations		2016-06-25
		sena pose la question : 2x/3+3y/2=-1 4x-5y=22 simultaneous equation Penny Nom lui répond.
	The difference between the ares of two rectangles		2016-06-09
		Ingrid pose la question : I am trying to help my son with an area question. I have the answer, from the solutions, but I cannot figure out how to teach him. Question: Two rectangles have lengths 13cm and 19cm respectively. Their total area is 376cm squared. If both their widths are whole numbers, what is the difference in their areas? I know that this is solvable once I determine the widths of the rectangles , but how do I go about finding that? Thanks for your help Chris Fisher and Harley Weston lui répond.
	A pair of equations with fractions		2016-05-11
		tiya pose la question : hello, i want to know how to solve this question. m/6+2n/3=6 -m/10=2n/5=2 Penny Nom lui répond.
	Solve 2^2x + 3(2^x) - 4 = 0		2016-04-27
		Lloyd pose la question : Solve the equation 2^2x + 3(2^x) - 4 = 0 Penny Nom lui répond.
	When does sqrt(x^2+y^2)=x+y?		2016-03-30
		Margret pose la question : when does sqrt(x^2+y^2)=x+y Penny Nom lui répond.
	Solve for x and y		2016-02-27
		ntshidi pose la question : Y=1/2x+4and1/4x-6 Penny Nom lui répond.
	Two equations in two unknowns		2016-02-13
		Anumba pose la question : 4x + 2y = 4 7x - y = -11 Penny Nom lui répond.
	The equation of a vertical line		2016-02-07
		Kagiso pose la question : The equation for a vertical line that goes through the point (7; -3) is? Penny Nom lui répond.
	A system of linear equations		2016-01-24
		kareem pose la question : my name is kareem and i am a student i have a math puzzle and i tried to solved it but it always have same mistake x-y=9 x+z=12 z-n=14 y+n=2 Penny Nom lui répond.
	A quadratic equation with equal roots		2016-01-23
		abdiwahid pose la question : X^2+2ax+4x+9a=0 is quadratic equation which has equal roots. Find the possible value of a? Penny Nom lui répond.
	Two transport companies		2016-01-06
		Brynleigh pose la question : The Sugar Sweet Company will choose from two companies to transport its sugar to market. The first company charges $5096 to rent trucks plus an additional fee of $200.75 for each ton of sugar. The second company charges $5500 to rent trucks plus an additional fee of $175.50 for each ton of sugar. For what amount of sugar do the two companies charge the same? What is the cost when the two companies charge the same? Penny Nom lui répond.
	A graph of the water level of a river		2016-01-05
		emoni pose la question : Suppose that the water level of a river is 34 feet and that it is receding at a rate of 0.5 foot per day. Penny Nom lui répond.
	Find the quadratic equation whose roots are -4 and 7		2016-01-03
		sadiya pose la question : Find the quadratic equation whose roots are -4 and 7 Penny Nom lui répond.
	Constructing simultaneous linear equations		2015-12-28
		Deborah pose la question : Linda thinks of a two-digit number. The sum of the digits is 8. If she reverses the digits, the new number is 36 greater than her original number. What was Linda's original number? Thank you! Penny Nom lui répond.
	Linear equations in two variables		2015-12-13
		priya pose la question : I have problem in solving these equations please help me today itself very urgent: I)2x+y=y II)pie*x+y=9 Penny Nom lui répond.
	A quadratic equation with known roots		2015-11-01
		Awudu pose la question : Given the roots of the quadratic equation ax^2+5x+c=0 are 5 and -2/3,find the values of a,b and c. Penny Nom lui répond.
	The flight of a ping pong ball		2015-10-13
		Abigail pose la question : Hello, Wondering if there is a way to figure out the quadratic equation of half of a parabola? Doing an assignment about finding quadratic equations for separate bounces of a ping pong ball, but the first bounce is incomplete (as the ball has presumably been dropped, hit the ground and then went on to make a complete bounce). Please see attachment for references to the diagram that I am using. Not sure whether I would have to look at it from a different perspective. Thanks, Abi Harley Weston lui répond.
	2p^2+4p=16. How do i get p?		2015-09-22
		Dohie pose la question : How do i solve this? 2p^2+4p=16. How do i get p? Thanks Penny Nom lui répond.
	Four equations in 3 unknowns		2015-08-23
		damien pose la question : solve: S x U - T = 44 T - U x S = 36 U + T - S = 7 U x U / S = 4 Penny Nom lui répond.
	Manipulating an equation		2015-06-05
		Leigh pose la question : Hi, I'm having trouble trying to find out how the equation y=mx+b for b comes up with the answer b=y-mx. Could you please assist me with this Penny Nom lui répond.
	The method of elimination		2015-05-01
		oreanna pose la question : Question from oreanna, a student: How do u solve 2x+9y=3 7x-4y=-25 in elimination Penny Nom lui répond.
	A word problem with fractions		2015-04-09
		Lorraine pose la question : If the numerator of a certain fraction is doubled and the denominator is increased by 1, the fraction becomes 1/2. If the numerator of the original faction is squared and the denominator is decreased by 2, the fraction becomes equal to 1. Let x be the numerator and let y be the denominator of the original fraction. Write down two simultaneous equation in x and y. Solve these equations to find two possible values for the given fraction. Penny Nom lui répond.
	Two consecutive positive integers		2015-03-01
		meha pose la question : Find two consecutive positive integers , sum of whose squares is 365. Penny Nom lui répond.
	Two equations with fractions		2015-02-26
		Pulane pose la question : Hi math centre I've been trying to solve these equations for days now please help (6/x)-(1/y)=4 (9/x)+1=(-2/y) Please help me solve them simultaneously Thank you Penny Nom lui répond.
	Two equations		2015-02-16
		nigel pose la question : 2x+1/2y=1 6x-3/2y=21 Penny Nom lui répond.
	The center and radius of a circle		2015-02-06
		ariana pose la question : I need to find the center and the radius of this circle. I don't know how to put 9/2 than square it into a fraction. x^2 + 2x + y^2 +9y=5 Penny Nom lui répond.
	1999 equations in 1999 unknowns		2014-11-28
		Subrahmanya pose la question : Solve the following system of 1999 equations in 1999 unknowns : x1+x2+x3=0, x2+x3+x4=0……., x1997+x1998+x1999=0, x1998+x1999+x1=0, x1999+x1+x2=0. (in x1,x2,...................,x1999 the numbers 1,2,.............,1999 are subscripts) Penny Nom lui répond.
	Two quadratic equations		2014-11-20
		rajesh pose la question : Sir, I would like to discuss on question- -Find the value of variable X and Y, equations are X2+Y2+2XY=25 X2+Y2-2XY=1 Sir, my point is equation looks not so easy.My opinion is there many (more than 4)value possible for both X and Y. Kindly help me. Waiting for your response. regards, rajesh Penny Nom lui répond.
	A linear system		2014-10-14
		pheter pose la question : 4/x - 1/y = 3 .... equation (1) 6/x - 2/y = 5 .... equation (2) Penny Nom lui répond.
	A quarter mile row of trees		2014-10-09
		junna pose la question : a farmer would like to plant trees on one side of his lot which is 1/4 of a mile in a length His friend advised him that if he would plant the trees 5 feet farther apart,he would need 44 fewer trees.If the farmer would take the advice, how many trees would he plant? Penny Nom lui répond.
	Two equations in x and y		2014-09-25
		seyilogo pose la question : solve y=2x - 3 and (4x - 2y) / x + y = 1 simultaneously Harley Weston lui répond.
	A quadratic equation		2014-09-20
		Najah pose la question : (E): (m2_1)x2 _ (m+3)x+4_m2=0 A) for what values of m is the equation (E) quadratic? B) for what value of m is the real number -1 a root of (E) Penny Nom lui répond.
	Two equations in two variables		2014-09-18
		Susan pose la question : (28x + 36y) - [20000 - .75(28x + 36y) + 60000] = 5000 x + y = 10000 solving two equations involving variables Penny Nom lui répond.
	The equation of a circle		2014-08-14
		jennifer pose la question : hi there My name is Jennifer and residing in Denmark. I am a student and I wrote to you because i am having trouble in finding out the equation for the circle using (x-a)^2 + (y-b)^2 =3D r^2.The diameter of this circle is d=3D 44,514 cm. I have attached a drawing of my problem..thanks Penny Nom lui répond.
	The method of elimination		2014-07-05
		leo pose la question : please explain how can i solve this problem 3x-6y=-38 6x-9y=44 using elimination and simultaneous method thank you :) Penny Nom lui répond.
	Simultaneous equations		2014-06-20
		rana pose la question : solve the simultaneous equations a)3x=7y 12y=5x-1 Penny Nom lui répond.
	The equation of a line		2014-05-16
		Michael pose la question : Find the equation of a line that passes through (2,-1); the sum of the x- and y-intercepts is 2. (There are two answers) Penny Nom lui répond.
	A quadratic equation given the roots		2014-04-23
		Sarah pose la question : How do you find the quadratic formula when you're given just the roots ... X=-3 X= 1/3 Thanks ! Robert Dawson lui répond.
	Simultaneous equations with fractions		2014-04-19
		Maryam pose la question : I looked at your example of simultaneous equations with fractions and applied it to my question from an educate exam papers but I couldn't get it to work. The question is: x/8 - y = -5/2 3x + y/3 = 13 Penny Nom lui répond.
	Manipulating an equation		2014-04-12
		Paul pose la question : S=4wl+2wh and solve for h Penny Nom lui répond.
	The equation of a circle		2014-03-07
		Balraj pose la question : I have to draw a circle x^2+y^2 =8x . please tell me how to understand these coordinates ? please elaborate , on how to understand these types of equations. Penny Nom lui répond.
	Paul is making banana bread		2014-02-17
		John pose la question : Paul is making banana bread. The number of cups of bananas he uses is proportional to the number of loaves of bread. Paul uses 11 1/4 cups of bananas to make 5 loaves of bread. Which equation represents the relationship between c, the number of cups of bananas, and b, the number of loaves of bread? A) C=4/9 b B) C=2b C) C= 2 1/4 b D) C=5b Penny Nom lui répond.
	Simultaneous fractional equations		2014-02-15
		benjamin pose la question : hi math central. benjamin here. during class, i had problem with this topic. normally i wont have problems with math but this topic i just too hard for me. please help i am having exam and test next week on this topic here is the question: using substitution method, solve the simultaneous equation. (x+1)/(y+2)=0.5 (x-2)/(y-1)=1/3 Penny Nom lui répond.
	Two nonlinear equations		2014-01-26
		Naryn pose la question : (1÷x) + (1÷y) = (7÷12) xy = 12 Penny Nom lui répond.
	A linear equation		2013-12-26
		khushboo pose la question : A farmer sowed wheat and paddy in two fields of total area 5000 sq.m. Write a linear equation and draw a graph to represent the same? Penny Nom lui répond.
	How do I graph y=-2x-1?		2013-12-07
		cindy pose la question : How do I graph y=-2x-1? Penny Nom lui répond.
	f(x)= a+b*lnx		2013-12-04
		Kevin pose la question : How do I find the curve, algebraically on paper, for f(x)= a+b*lnx with data points (6,1303) (9,1639). I can do it with LnReg on a calculator but I want to know how to get the same results or close to the same results by working it out on paper. When I run it through the LnReg on the calculator I get, f(x)=181.792+828.678 Ln x. How did it achieve this solution? Penny Nom lui répond.
	A quadratic equation		2013-11-27
		corinanna pose la question : Hi, How do you find a quadratic equation given the domain & range, & or the y-intercept? Penny Nom lui répond.
	Solve 0=-2(x-5)^2+4		2013-11-17
		Leila pose la question : How do you find the solution to 0=-2(x-5)^2+4 Penny Nom lui répond.
	Substitution type simultaneous equations		2013-11-03
		Kayla pose la question : I am having problems with substitution type simultaneous equations, when the variable you are substituting is a algebraic one: y=x^2-3x+4 and 3x-2y=1 I have rearranged 3x-2y=1 to get x=(1+2y)/3 but when I substitute this x value into the other equation, I get the wrong answers! Would appreciate any help! Thank you. Penny Nom lui répond.
	An equation with fractions		2013-10-22
		Bill pose la question : 1/5n= -9 Solve this equation in simple steps! Penny Nom lui répond.
	A line through (5, 1)		2013-10-08
		allison pose la question : find an equation in standard form for line passing through point (5,1) and perpendicular to line x=4 Penny Nom lui répond.
	A system of equations		2013-08-13
		Nina pose la question : 3x-2y=8 -x+3y=5 What is the solution of the system of equations Penny Nom lui répond.
	An equation in slope-intercept form		2013-08-12
		Brittney pose la question : write an equation in slope-intercept form of the line that is parallel to the grapg of y=-3/4x+6 passes through -8,-5 Penny Nom lui répond.
	Four equations		2013-08-08
		may pose la question : HI how to solve this 4 equations? A+C = 0 -4A+B-8C+D=1 3A+16C-8D=-29 -12A+3B+16D=5 Robert Dawson lui répond.
	A quadratic with no real roots		2013-07-15
		Pranav pose la question : If ax^2+bx-5=0 has no real roots. Then d sign of 1) a+b-5 2) (25a-5b-5)(4a+2b-5) will be what ?? Penny Nom lui répond.
	Simultaneous equations		2013-07-10
		Warren pose la question : solve this simultaneous equation: xy=4 2x+3y=14 Penny Nom lui répond.
	An equation in two variables		2013-05-14
		Steve pose la question : Verify solutions to an equation in two variables. 4x-2y=8 (3, 2) Penny Nom lui répond.
	4 linear equations with 3 unknowns		2013-04-12
		Marian pose la question : how to solve for 3 unknowns in 4 simultaneous equations Penny Nom lui répond.
	The equation of a line		2013-04-04
		Miranda pose la question : My coordinates provided are (6, 6) and (-8, 9) and i need to put this into ax=bx=c format. I remember the equation to find the slope of y2-y1/x2-x1 to get the slope. However when i put that back into the y=mx+b format it still leaves me with a lot of variables. Please help :) Penny Nom lui répond.
	Simultaneous equations with fractions		2013-03-31
		Terence pose la question : 5/x-6/y=1 17/x+30/y=16 I been spending whole day to solve this question. Would be very grateful if you can help I try The denominator value is a equations term which make is simultaneous equations so hard. Penny Nom lui répond.
	f(x) + f ''''(x)=0		2013-03-05
		Andreea pose la question : Hei. I don’t speak lot of english but here is my question,hope u understand: f(x) + f ````(x)=0. so, my question. what is f(x), where f ````(x) is f(x) derivative by four time ? i tried to find the answer and i knew f(x) is something like that f(x)=e^x*sinx but miss something. Brennan Yaremko lui répond.
	The tangent to a circle at a point on the circle		2013-02-22
		Andrew pose la question : What is the equation of the line tangent to the circle with equation x^2+y^2=25 at the point (-4,3) Penny Nom lui répond.
	A word problem involving toys		2013-02-14
		sandy pose la question : Each boy gets 5 toys.Each girl gets 3 toys.There are 150 pupils. The boys had 74 more toys than girls. How many boys? How many girls? Penny Nom lui répond.
	A curve in 3-space		2013-02-14
		pardeep pose la question : we have to show that the curve r(t)=(cos t)i+(sin t)j+(1-cos t)k ,0<=t<=2pie; is an ellipse by showing it to an intersection of a right circular cylinder and a plane. i got the eqn. of the cylinder but did not get the eqn of plane. Harley Weston lui répond.
	Dropping supplies from an airplane		2013-02-14
		Claire pose la question : An airplane flying at an altitude of 3500 feet is dropping supplies to researchers on an island. The path of the plane is parallel to the ground at the time the supplies are released and the plane is traveling at a speed of 300 mph. a) write the parametric equations that represent the path of the supplies c)How long will it take for the supplies to reach the ground? d) how far will the supplies travel horizontally before they land? Penny Nom lui répond.
	The equation of a circle		2013-02-11
		mhd pose la question : Complete the equation of the circle centered at(0,4) with radius 3 Penny Nom lui répond.
	Simultaneous equations		2013-02-10
		Michael pose la question : 2P + 1/3V =8 3P - 2/V=5 Penny Nom lui répond.
	7x-1/4-1/3[2x -1-x/2]=19/3		2013-02-03
		M pose la question : 7x-1/4-1/3[2x -1-x/2]=19/3 Penny Nom lui répond.
	The zeros of a fourth degree polynomial		2013-01-23
		Dakota pose la question : My problem has multiple steps and I have done everything but the last one. 8The original problem is f(x)=x^4-5x^3+7x^2+3x-10 and I have to find the zeros of the equation. I used synthetic substitution like my teacher taught us to get the equation of x^3-3x^2+x+5=0 but now I don't know how to get the zeros of that equation, or solve it. Penny Nom lui répond.
	Two quadratic equations		2012-11-22
		fahmie pose la question : graph and solve the intersection of the following equations: x^2+y^2=4 x^2+2y=4 Penny Nom lui répond.
	A word problem involving a fraction		2012-10-12
		Derrick pose la question : If the numerator and denominator of a fraction are both decreased by 1 the fraction becomes 2/3. If the numerator and denominator are both increased by 1 the fraction will be 3/4. Find the original fraction. How to do? Penny Nom lui répond.
	A problem that yields a linear equation		2012-10-07
		Eshraj pose la question : one fourth of a whole number is three more than one fifth of the next whole number.find the whole number Penny Nom lui répond.
	Minutes and seconds		2012-08-29
		Casey pose la question : I have to write a variable equation. The questions says there are 60 seconds. but we need to write and equation to solve for minutes. Is it 1/60 or 1/s Robert Dawson lui répond.
	Problem solving		2012-08-15
		Sugavanas pose la question : If length of a rectangle exceeds its width by 5 m. if the width is increased by 1m and the length is decreased by 2 m, the area of the new rectangle is4 sq m less than the area of the original rectangle. Find the dimensions of the original rectangle. Penny Nom lui répond.
	2x+underroot2=3x-4-3underroot2		2012-07-09
		Eshraj pose la question : 2x+underroot2=3x-4-3underroot2 Penny Nom lui répond.
	A quadratic function		2012-06-08
		Salehah pose la question : Hi there, i dont know how to do quadratic equations. So how do i do the question, that says: x-int -4 and 2, and y-int of 4? and we are to maek a quadratic function with this information. Please help! Thank you very much! Salehah Robert Dawson lui répond.
	Solve for x		2012-05-12
		Desiree pose la question : 3x -5^2=8 Penny Nom lui répond.
	An equation of the form y=mx		2012-04-17
		Samiya pose la question : what would be an equation of the form y=mx with the points (-2, 6) and (1, -3) for the line? Penny Nom lui répond.
	The equation of a line		2012-03-26
		Danielle pose la question : Hello, could you help me figure out what the equation of the line is in the form of Ax+By=C with the points (-2,0) and (0,3)? Thank You! Penny Nom lui répond.
	A vertical line passing through (10,4)		2012-03-16
		Isabelle pose la question : Hi! My question is this: Write the equation of each line described: A vertical line passing through (10,4) I would really appreciate your help! Thanks, Isabelle Penny Nom lui répond.
	Parametric equations 2		2012-02-25
		Kathy pose la question : If the angle at time 0 is not 45 degrees how can you find the initial velocity? Ball thrown from height of 7 feet. Caught by receiver at height of 4 feet after traveling 90 feet down the field. Find initial velocity. You had a similar problem answered but the angle was 45 degrees so the cos and sin were equal and the equations were simpler to work with. Thank you! Harley Weston lui répond.
	-8(3x+4)+6x=4(x-8 )+4x		2012-01-18
		bianca pose la question : -8(3x+4)+6x=4(x-8 )+4x Penny Nom lui répond.
	An equation with fractions		2012-01-06
		Balkees pose la question : 3/4(4-8x)=2x-2/3(6-12x) Penny Nom lui répond.
	A parabolic arch		2012-01-04
		Swathi pose la question : A plan for an arch in the shape of a parabola is drawn on a grid with a scale of 1m per square. The base of the arch is located at the points (0,0) and (15,0). The maximum height of the arch is 18m. a)Determine the quadratic function that models that arch b)State the domain and range of the function Penny Nom lui répond.
	Three consecutive numbers		2011-11-29
		Michael pose la question : Find three consecutive numbers such that the second number squared is equal to the first and third added together Penny Nom lui répond.
	Linear equations		2011-10-06
		Hannah pose la question : I am confused about a question on my homework, here is an example on what I need to do: You own a sightseeing boat tour. Kids' admission costs $5, adults' admission costs $8. During that day you get (made-up number) $521 with 71 admissions. How many of each passenger boarded? I tried something like 5x + 8y = 521 x + y = 71 But, I still don't understand how to solve it! Help? Penny Nom lui répond.
	A picture with a frame		2011-08-19
		Aniish pose la question : A picture 8inches by 12inches is placed in a frame of uniform width. If the area of the frame equals the area of the picture find the width of the frame? Penny Nom lui répond.
	An equation in the form Ax+By=C		2011-07-28
		Mike pose la question : I need to write an equation in the form Ax+By=C The points I was given are (5,0) and (-3,5) I know how to find the slope I got -5/8 and wrote it out as y=(-5/8)x+b however I'm not quite sure where to go from here. Any help would be greatly appreciated. Penny Nom lui répond.
	A linear equation with fractions		2011-07-13
		Simon pose la question : I would like to ask if you would be able to explain : linear equation: 2 1/2 (X-1) - x+3 /3 = 4 , the first step shows multiplying by 2 then multiplying by 3. etc. What I don't understand is where the 2 in multiplying by 2 comes from? ( the three is pretty obvious being x+3 /3 (to get rid of the divided by) ) . Thanks for your help. Penny Nom lui répond.
	U(n+1) = 2Un + 1		2011-05-22
		Cillian pose la question : In a certain sequence, to get from one term to the other you multiply by 2 and add 1, i.e. This is a difference equation of form: U(n+1) = 2Un + 1. prove that there is a maximum of 2 perfect squares in this sequence Claude Tardif lui répond.
	The equation of a sphere		2011-04-16
		kanika pose la question : equation of sphere and how to know its center Penny Nom lui répond.
	Eliminate y		2011-04-07
		Lynn pose la question : 2x + y = 8 y + 3z =5 z + 2w =1 5w + 3x = 9 Form three equations with y eliminated Penny Nom lui répond.
	Tony and his friends		2011-03-21
		Mieke pose la question : Using the following statements and the information given, how much money did each friend have. Mike says, "I have $41.00 more than Tony." Jessica says, "I have 6 times as much as Tony plus $2.00." Ashley says, "I have 13 times the amount Tony has." Sara says, "I have the 8 times the amount Tony has." The total together they had was $304.00 Penny Nom lui répond.
	The equation of a circle		2011-02-14
		Cristela pose la question : find the equation and all the information in General Form and Standard Form of the Circle that will passed trough the point (2,3) (6,1) (4,-3) Stephen La Rocque lui répond.
	The equation of a sphere		2011-02-09
		kelly pose la question : what is the equation of a sphere if one of it's diameters has a giving end point of (4,4,4), (8,8,8)? Penny Nom lui répond.
	Throwing a football		2011-02-08
		Janet pose la question : a football is thrown into the air from 2 meters high. After 1 second it is 6.9 meters high. After another second it is 2 meters high. How high is it after 1.02 seconds and .05 seconds? when will it reach 5.136 meters? I am not sure how to extract the numbers I need and what equations to use them in? Stephen La Rocque lui répond.
	The greatest value of 5 – | x – 3|		2011-01-16
		pranav pose la question : What is the greatest value of 5 – | x – 3 | for any integral value of x. --< br /> PRANAVM Penny Nom lui répond.
	2x = 2+2x		2011-01-15
		james pose la question : 2x=2+2x can you help me find what x epauls? Penny Nom lui répond.
	Simultaneous equations		2010-12-05
		ryan pose la question : Question from ryan, a student: 3         4 --   -    --      =     1      (1) x         y 7       2             11 --   -  --        =   --       (2) x       y              12 Chris Fisher and Stephen La Rocque lui répond.
	Two girls agree to mow a lawn		2010-11-23
		Milorad pose la question : Two girls agree to mow a lawn 60m by 80m so that the first girl cuts one half by cutting a uniform strip around the lawn. How wide a strip should the first girl cut? I've been struggling with the question above, mainly with the equation and I have set it up as 2400=(60-2x)(80-2x), if this is incorrect I would like to know where I've gone wrong and also would like a full answer to see it properly done. I need an algebraic answer and not one with a diagram. Penny Nom lui répond.
	What is the speed of each car?		2010-11-04
		Jennifer pose la question : two cars are 420 miles apart and traveling towards each other along the same road. They meet in 3.5 hours. One car is traveling 15mph slower than the other. What is the speed of each car? This must be solved using a system of equation, I have no idea? Stephen La Rocque lui répond.
	sin14.5/a = sin150/280		2010-10-26
		ken pose la question : how do you do the steps to this equation. sin14.5/a = sin150/280 the text book answer is 140.21 miles ,but how do the steps? Penny Nom lui répond.
	The equation of a circle		2010-10-20
		Silvan pose la question : Hi, I just want to find the x,y values for the circumference of a circle... Lets take a clock having its centre at (0,0) in a graph. I just want to know how to find the (x,y) co-ordinates for the curved path or the surface of the circle.. Is there any formula to directly align the curved path or the circumference of the circle in a graph for a known radius of a circle.. I feel it will be useful for me to draw a clock in a graph... :-) Penny Nom lui répond.
	An exponential equation		2010-10-19
		Sandi pose la question : Question from sandi, a student: I have several questions similar to this one and was wondering if you could walk me through this one. I'm totally lost on how to do it. Paramecia reproduce by splitting in two. In a laboratory flask, a colony of paramecia had an initial population of 500. Each day, the population of the paramecia was counted. The results are as listed. Time (in days)------Population 0-----------------------500 1-----------------------600 2-----------------------720 3-----------------------864 4----------------------1037 5---------------------1244 6---------------------1493 7----------------------1792 8---------------------2150 1.)Using graphing calculator make a scatter plot of the data in table. I think I did this part right I set my window at Xmin=0 Xmax=10 Xscl=1 Ymin=0 Ymax=2500 Yscl=100 Xres=1 2.) Determine an exponential equation to represent the population as a function of time without using a graphing calculator.I have no clue how to do this. 3.)Suppose the flask and food supply is large enough to support the trend of the population growth. Estimate the population of the colony when the time is 10 days. Penny Nom lui répond.
	The equation of a line		2010-10-19
		Sava pose la question : I have to write an equation and sketch a graph for the line that meets the given conditions: A line with slope -15/5 that passes through the point (-2.5,4.5) Penny Nom lui répond.
	Find the point of contact of the circles		2010-09-20
		Sandra pose la question : If the center of circle A = (-1,-3) and the radius of it is √20, the center of circle B = (5,9) and the radius of it is √80. Find the point of contact of the circles A and B. Janice Cotcher lui répond.
	The circle centered at (2,-4) with radius 3		2010-09-18
		lupe pose la question : Consider the circle centered at (2,-4) with radius 3. Write the equation of this circle sketch its graph, and find the exact coordinates of its intercepts. x-intercept y-intercept using the quadratic equation? Penny Nom lui répond.
	An algebraic equation with fractions		2010-09-10
		leah pose la question : If 6/x - (x-1)/2 = 4 then the LCD is 2x, right? so you get 12/2x - (x2-x)/2x = 8x/2x, right? then what do you do with the 2x when you turn it into a quadratic equation? Penny Nom lui répond.
	A logarithmic equation		2010-09-08
		Rohit pose la question : x^2 + k*ln(x) - c - k = 0 Where k and c are constants. Penny Nom lui répond.
	Algebraic Equations		2010-08-10
		Justin pose la question : the amount of money that Mika has if she has some quarters how fast Rya runs if she runs 5 mi/h slower than Danae please help, thanks, justin Robert Dawson lui répond.
	A rational equation		2010-08-02
		Bailey pose la question : 3/x + x/x+2 ______ -2/x+2 Penny Nom lui répond.
	The suspension cables of a bridge		2010-07-29
		Mike pose la question : what is the formula for the suspension cables of a bridge. The towers are 200 ft above the roadway The towers are 3400 ft apart The cable if at 8ft in the middle of the span Robert Dawson lui répond.
	The equation of a parabola		2010-06-29
		Tiffany pose la question : Find the equation of a parabola that passes through the points (-2,3), (-1,1) and (1,9) Stephen La Rocque lui répond.
	The equation of a circle		2010-06-23
		Michelle pose la question : Write and equation for the circle with a center, (0,0) and a diameter of 12 Penny Nom lui répond.
	A quadratic equation with imaginary numbers		2010-06-03
		Alissa pose la question : I am solving a quadratic equation and I got this far; (x-4+i)(x-4-i)=0 but how do I add the imaginary numbers i know you multiply x by x and then add -4 + -4 but what do you do with the i's? Penny Nom lui répond.
	A quartic equation		2010-05-18
		Austin pose la question : Z^4-10z^2=-9 Penny Nom lui répond.
	The product of two consecutive even integers		2010-05-11
		Terry pose la question : The product of two consecutive even integers is 14 more than their sum. Find the integers. Penny Nom lui répond.
	The equation of a circle		2010-05-04
		crystal pose la question : find the standard form of the circle with center (-2,3) and tangent to the line y=1 Penny Nom lui répond.
	A quadratic equation		2010-05-03
		Millie pose la question : (3x-4)(5xplus2)=0 Penny Nom lui répond.
	Solving a trig equation		2010-04-21
		Jason pose la question : Please Help! My question is : Find all of the solutions to sin(x/2)+cosx-1=0 Penny Nom lui répond.
	The median		2010-04-18
		amper pose la question : How could i get the median with this equation f(x)=(x^2+4)3/13 0 Harley Weston lui répond.
	Four less than three times a number is 14		2010-04-16
		David pose la question : My daughter has two questions that we could use some help with. First ? Four less than three times a number is 14 Secound? The quotient of -15 and w Penny Nom lui répond.
	Polar coordinates		2010-04-14
		Lan pose la question : Given the rectangular equation (x^2)+2x+(y^2)+y=0, find the polar equation. Harley Weston lui répond.
	A system of equations		2010-03-30
		samantha pose la question : the equations of two lines are 6x-y=4 and y=4x +2.what is the value of x in the solution for this system of equations? Penny Nom lui répond.
	The sides of a 30-60-90 triangle		2010-03-29
		maris pose la question : Find the sides of a 30-60-90 triangle whose perimeter is 6. The solution must use systems of equations using 3 variables. Penny Nom lui répond.
	The line passing through (2,6) and (2,9)		2010-03-24
		antoinette pose la question : the equation of a line passing through the points (2,6) and (2,9)? Penny Nom lui répond.
	The line joining (3,4) and (-5,-6)		2010-03-06
		Patric pose la question : Find the condition that the point (x,y) may lie on the line joining the points (3,4) and (-5,-6) Penny Nom lui répond.
	How many CDs and videos did the store sell?		2010-03-01
		dawn pose la question : A used book store started selling CDs and videos. In the first week,the store sold 40 used CDs and videos,at 4.00 per CD and 6.00 per video.The sales for both CDs and videos totaled 180.00 she wrote a system of equations to represent the situation.Then she graph the system of equations thanks- Dawn Tyler Wood lui répond.
	The equation of a circle		2010-02-18
		AHMED pose la question : find the equation to the circle with centre at the point (1,-1) and touching the straight line 5x+12y=7. Penny Nom lui répond.
	Substitution		2010-02-14
		Izayah pose la question : what is 3 ways to find the meeting point of y=2x+4 and 3x+y=7 by making 2 table and using a graph Stephen La Rocque lui répond.
	A piece of string 8 inches long is cut in two pieces		2010-02-02
		Susan pose la question : If you have a piece of string 8 inches long and cut it in two pieces. Then take the pieces and forms each into a square such that the area of each squares added together equals 2. How long are the sides of the squares? Susan Penny Nom lui répond.
	A linear equation with the variable on both sides		2010-01-16
		dog pose la question : 4x-9=7x+12 Penny Nom lui répond.
	A pair of simultaneous equations		2010-01-09
		Yumiko pose la question : Solve the following pair of simultaneous equations. x^2 -4x = y^2-4 3y=2x - 3 Penny Nom lui répond.
	A linear equation with fractions		2009-12-31
		Michelle pose la question : How would I solve: (-2)(-1/2x + 5) = (-2)(8)? Penny Nom lui répond.
	Solving two equations, one with a square root		2009-11-23
		kacie pose la question : y = square root of x+3 x-4y = -7 im having trouble with this problem...i have to find where they intersect. Harley Weston lui répond.
	The equation of a circle		2009-10-17
		Renson pose la question : A circle passes through (4,2) and (11,-5) with center on the line 3y-5x+41=0.Determine its equation in standard form. Penny Nom lui répond.
	541.39(1 + i)^15 = 784.09		2009-10-14
		Fitore pose la question : Hi, I noticed that this question was already posted up, however I was hoping I could solve it without having to use logs. Can you please help me? The equation is: 541.39(1 + i)^15 = 784.09 Penny Nom lui répond.
	A right triangle		2009-10-12
		Josseph pose la question : A right triangle has an area of 84ft sq. and a hypotenuse 25ft long. What are the lengths of the other two sides? Penny Nom lui répond.
	Two equations in two unknowns		2009-09-18
		Citizen pose la question : x+-3y=7 -x+4y=7 Penny Nom lui répond.
	The method of substitution		2009-09-17
		laura pose la question : ok! i really need help with this question plz help!! x= - 4y +5 x+2y = 7 Penny Nom lui répond.
	10x-8 /3 =6x+24 /5		2009-09-16
		Heidi pose la question : 10x-8 /3 =6x+24 /5.....I know the answer is 7/2 but how do I get there? Penny Nom lui répond.
	The slope-intercept form		2009-09-11
		Shelby pose la question : Write an equation in slope-intercept form of the line that is parallel to the graph of 3y-4x=1 and passes through (0,6) Penny Nom lui répond.
	Quadratic equations		2009-08-30
		jovian pose la question : how can i find the quadratic equation of the roots 2/5 and -1/3? Stephen La Rocque lui répond.
	The equation of a circle		2009-08-30
		tagbo pose la question : find the eqn of circle passing through (-1 1) and (-1 -4)and whose radiusis 5/2 Stephen La Rocque lui répond.
	Simultaneous equations		2009-08-28
		onias pose la question : solve 3/a - 2/b = 1/2 , 5/a + 3/b = 29/12 Robert Dawson lui répond.
	y=2x+1 and y=2x-1		2009-08-28
		MARICELA pose la question : Need help of how to work this problems y=2x+1 and y=2x-1 First of all what is the difference? Second I think is easy just to work with the X y with the line in the middle but how do you get the numbers for each side. Penny Nom lui répond.
	Factoring		2009-08-23
		Bj pose la question : Solve for x: 5x^2 - 35x = 0 Stephen La Rocque lui répond.
	Linear equations		2009-08-23
		shwetha pose la question : The length of a rectangle is greater than the breadth by 18 cm. If both length and breadth are increased by 6 cm then area increases by 168 cm square. Find the length and breadth of the rectangle. Stephen La Rocque lui répond.
	Circular Measures		2009-07-24
		onyeka pose la question : find the equation of a circle with point [3,7][5,5] and wich center lies on the line x-4y=1 Robert J. Dawson lui répond.
	A binary equation		2009-07-07
		Chinonyerem pose la question : Find a bitwise solution (i.e find xi so that each xi E {0,1}) to 32 = x1 + 2x2 + 4x3 + 9x3 + 20x5 Harley Weston lui répond.
	Simultaneous Equations		2009-07-06
		Mukulu pose la question : Solve the equation simultaneously X/5=(Y+2)/2= (Z-1)/4 ……………….eqt 1 3X+4Y+2Z-25=0 ………………eqt 2 Janice Cotcher lui répond.
	Two equations		2009-05-31
		tony pose la question : y = 1.2x - 32.7, y = -0.7x + 46.15 can you please solve this for me? i am not able to figure it out... thank you tony Penny Nom lui répond.
	(x + 1) / 3 + (x + 2) / 7 = 2		2009-05-22
		MzDonna pose la question : Question from MzDonna, a parent: We can't seem to get an answer for this problem: X + 1      X + 2 _____ + _____   = 2    3              7 The book gives the answer as 10 ; But, we struck. Please help us.                                                ___                                                 21        Thanks in advance for your assistance. Stephen La Rocque lui répond.
	Two equations		2009-05-18
		Bob pose la question : solve the system: x/2 - 2y= -8 3x + 2/3y= -10 Stephen La Rocque lui répond.
	3h+10 divided by 2 +9=20		2009-05-05
		CJ pose la question : what is the solution for the equation 3h+10 divided by 2 +9=20 Penny Nom lui répond.
	4cos^2 (3x) + 3sin (3x) = 1		2009-05-05
		Cheryl pose la question : Find all solutions of the following equation and show how to do this algebraically. 4cos^2 (3x) + 3sin (3x) = 1 Harley Weston lui répond.
	A quadratic equation with roots (4-i) and (4+i)		2009-05-05
		Kelly pose la question : find a quadratic equation with roots (4-i) and (4+i) Harley Weston lui répond.
	Stairway construction		2009-05-02
		Olivia pose la question : Hi, I'm Olivia and I'm in 8th grade studying algebra 1. I'm having some trouble with my math project. It has to do with rules of stairway construction. It says that there are two generally accepted rules to building stairs. Rule 1: x+y=43 and x+y=46 (cm) Rule 2: 2y+x=61 and 2y+x=64 (y is the riser and x is the tread length) I cant figure out how to graph them...it says they're supposed to intersect to make a square which is like the safety zone for building stairs (the stairs' rise and tread lengths are plotted as points) any points outside of that square are considered unsafe. Did i explain it ok? Thanks for your help. --olivia Penny Nom lui répond.
	Negative nine minus 7x = negative 5		2009-04-23
		gigi pose la question : what is negative nine minus 7x = negative 5 Robert Dawson lui répond.
	cos2x = sinx		2009-04-19
		stacey pose la question : solve the equation cos2x = sinx for 0 < x < 2 pi giving the answer in terms of pi. Harley Weston lui répond.
	A circle tangent to the X-axis		2009-03-29
		Kiera pose la question : Find an equation of the circle that satisfies the stated conditions. Center C(4,-1), tangent to the x-axis Penny Nom lui répond.
	An infinite number of solutions		2009-03-24
		Sean pose la question : this is a linear equations problem; first: 3535.5 + Fbd (.866) + Fbc (.5) - Fab (.5) = 0 and -3535.5 - Fab (.866) - Fbc (.5) - Fbd (.5) = 0 Harley Weston lui répond.
	Solving an equation for b		2009-03-13
		ernest pose la question : If 2b=96+b+96+1/2b solve for b? Penny Nom lui répond.
	The equation of a line		2009-03-11
		Teresa pose la question : Write an equation in slope-intercept form that has a horizontal intercept of -7/3 and a vertical intercept of -7/9 Harley Weston lui répond.
	The substitution method		2009-02-18
		Nicolette pose la question : I am working on linear programming problems that I need to solve pairs of linear equations for. I am confused and am not sure how to solve these problems! 5x+3y=7      y=x-3 How can i solve this using the substitution method? Penny Nom lui répond.
	A line parallel to a given line		2009-02-18
		Lisa pose la question : I'm having a hard time understanding the concept of how to write an equation of the line containing the given points and parallel to the given line. Express the answer in the form of y=mx+b. (7,9); 2x+5y=4. i would appreciate it alot if someone can show ne how to do this. Thank you, Lisa Penny Nom lui répond.
	y = p q^t		2009-02-12
		Conor pose la question : y= p x (q (to the power t) ) ; y= 100 when t = 2 and y= 4 when t= 0 a) find p and q b) hence find y when t=4 Stephen La Rocque lui répond.
	A rectangular park		2009-02-06
		Debbie pose la question : A park named Writer's Rectangle opened in town. When asked about the dimensions of the rectangle, the city planner, responded with these clues: ---The diagonals of the rectangular park plus its longer sides together measure seven times one of the shorter sides. ---The length of one diagonal is 250 m longer than one of the shorter sides. Use this information to find the area of the park. Stephen La Rocque lui répond.
	The substitution method		2009-02-06
		amber pose la question : Pleasse help me with this problem x+y=-2 y-2x=1 Penny Nom lui répond.
	Simultaneous equations with an xy term		2009-02-01
		angelee pose la question : xy+5x-2y-10=0 2x+y=1 Penny Nom lui répond.
	ax^2 + bx + c = 0 has no real roots and....		2009-01-26
		Alberto pose la question : The equation ax^2 + bx + c = 0 has no real roots and a + b + c < 0 . Chose the right answer: (A) c > 0 (B) c <= 0 (C) c = 0 (D) c >= 0 (E) c < 0 Explain the choice. Robert Dawson and Harley Weston lui répond.
	Using y = mx + b		2009-01-26
		Caroline pose la question : How do you write a symbolic representation using the y=mx+b method? Robert Dawson lui répond.
	Sheep, goats, and hogs		2009-01-23
		La pose la question : A man buys sheep, goats, and hogs, to the number of 100, for 100 crowns; the sheep cost him 1/2 a crown a-piece; the goats cost him 1-1/3 crowns a-piece; and the hogs cost him 3-1/2 crowns a-piece. How many had he of each? Robert Dawson lui répond.
	Solve for x		2009-01-16
		maritza pose la question : 5=3(x-2)= Penny Nom lui répond.
	The table of values for y=3x-10		2009-01-09
		Jade pose la question : How can I know the value of x for y=3x-10 in this table of values pls. include the deatails if x=-2 y=-16 if x=3 y=-1 but how if y=2 what is x Penny Nom lui répond.
	System of equations - comparison method		2009-01-02
		nick pose la question : Hi, I am doing a project on system of equations by using comparison method, but for some reason or another, i can't seem to find any information on the comparison method at all. So, please would you help me by giving me a website that you know of that has some information on my method. And, if you know the answer, can you please tell me why or when do we use system of equations by using comparison method? Thank You Robert Dawson lui répond.
	The inverse function for F(x)=x^3+x		2008-12-18
		alireza pose la question : I want inverse function for F(x)=x^3+x Robert Dawson lui répond.
	A line in slope intercept form		2008-12-08
		laurie pose la question : the question: Write and equation of the line that passes through the point and has the give slope. Then rewrite the equation in slope intercept form. (2, 5 ) m= 3 Penny Nom lui répond.
	Quadratic equations arising from practical problems		2008-11-24
		Lenval pose la question : Why do quadratic equations arising from practical problems often give physically impossible solutions such as negative distances, negative times or, say, a polygon with a negative number of sides? For example: "A river in flood carries a tree t-squared - 23t metres downstream in t seconds. How long does it take for the tree to be carried 50 metres downstream?" This gives t=25 and t=-2. Please explain the second 'solution', which is not physically possible. Chris Fisher and Victoria West lui répond.
	Solve 3x +5= 4x-10		2008-11-22
		Nikko pose la question : HELP please how do I solve these type of questions? 3x +5= 4x-10 or 4x +10= 6x-8 Penny Nom lui répond.
	What is -5x+3y=24?		2008-11-13
		Robert pose la question : What is -5x+3y=24??????? Stephen La Rocque lui répond.
	Algebraic equations with fractions		2008-11-07
		John pose la question : Solve each equation. Check each solution. 1/8+5x/x+2=5/2 10/2y+8 - 7y+8/y(squared)-16 = -8/2y-8 Harley Weston lui répond.
	Solve the equation 2x + y = 6 for y.		2008-11-07
		fatiuma pose la question : Solve the equation 2x + y = 6 for y. Penny Nom lui répond.
	Separating variables		2008-11-04
		Terry pose la question : by separating variables solve the initial value problem (x+1)y' + y = 0 y(0) = 1 Harley Weston lui répond.
	A linear system		2008-10-22
		Tiffany pose la question : solve: x + y + z = 4 2x - 3y - z = 1 4x + y - 2z = 16 Penny Nom lui répond.
	A canal with cross section a semicircle		2008-10-19
		Connor pose la question : a canal with cross section a semicircle is 10m deep at the centre. Find an equation for the semicircle and use it to find the depth 4m from the edge Penny Nom lui répond.
	Two equations in two unknowns		2008-10-17
		Dushayne pose la question : Please help me in solving this problem: a. 3x-4y=32 5x+2y=10 b. 2x+3y=11 4x+3y=10 Penny Nom lui répond.
	A linear equation with fractions		2008-10-07
		Christopher pose la question : 1/6(x-18)+1/8(x+8)=x-9 Penny Nom lui répond.
	Solving an Equation with a Square Root		2008-10-05
		Jonathan pose la question : the square root of 3x+18 = x 3x+18 are within the square root Victoria West lui répond.
	cos^2x - 3cosx = 1		2008-09-29
		Danielle pose la question : cos2x - 3cosx = 1 Penny Nom lui répond.
	Two Step Equation		2008-09-17
		calea pose la question : i really dont now what two-step equation means? Janice Cotcher lui répond.
	A line through two points		2008-09-10
		Conor pose la question : Find the equation of the straight line which passes through the points (-2,14) and (8,-1) Penny Nom lui répond.
	A line parallel to y= 1/2x + 5		2008-09-03
		Michelle pose la question : Find the equation of a line parallel to y= 1/2x + 5 if the required line passes through ( 3,4) Penny Nom lui répond.
	A cubic equation		2008-08-25
		RAM pose la question : The following Cubic Eqn should have three roots - what are they? x^3-27=0 Penny Nom lui répond.
	y^2+3yz-8z-4z=0		2008-08-17
		Rae pose la question : y^2+3yz-8z-4z=0 Penny Nom lui répond.
	Two equations in two unknowns		2008-08-01
		James pose la question : Question from james, a student: 3x+2y=9;24x-2y=18 My math teacher says that it is (2,-4) Can someone please explain how to figure this out by graphing? Victoria West lui répond.
	algebra		2008-07-31
		Eric pose la question : Would you please solve & explain this equation to me: x^2+2x=x(x+2)? Thank you Penny Nom & Stephen La Rocque lui répond.
	Width of a Garden Path		2008-07-30
		Erin pose la question : A rectangular garden has dimensions of 18 feet by 13 feet. A gravel path of uniform width is to be built around the garden. How wide can the path be if there is enough gravel for 516 square feet? Janice Cotcher lui répond.
	Simultaneous equations		2008-07-23
		Franco pose la question : Solve 3 D + E - F = -10 -2 D - F = -4 -3 D - 4 E - F = -25 Franco Penny Nom lui répond.
	solving four simultaneous equations		2008-07-18
		Muhammad pose la question : -2B-2C+4E=1 A+B+C+D=0 -2B-2C-2D+E=0 B+C+4D-2E=0 Janice Cotcher lui répond.
	CIRCLES		2008-07-07
		daryl pose la question : Find the equation of the smaller circle that is tangent to the axes and the circle x(squared)+y(squared)=2x+2y-1? Penny lui répond.
	Points on a graph		2008-07-03
		Rita pose la question : Dertermine if the given 3 points are on the graph of the equation. Equation: y = (x^3) - [2(sqrt{x})] Points: (0, 0); (1, 1); (1, -1) Penny Nom lui répond.
	A series solution of y' = xy		2008-07-03
		sasha pose la question : I've to find the power series solution of the differential equation: y' = xy. I don't know how to find the recursive equation. Can you please help me. Thanks Harley Weston lui répond.
	3y^2 - 48 = 0		2008-06-23
		marquis pose la question : 3y^2 - 48 = 0 Stephen La Rocque lui répond.
	9(d+5)=3(d-3)+6d		2008-06-19
		davontay pose la question : 9(d+5)=3(d-3)+6d Harley Weston lui répond.
	A piecewise equation		2008-06-16
		John pose la question : AT&T charges $39.99 for 450 minutes per month. It charges 45 cents per minute over the 450 minutes. How can I make a piecewise equation of this problem? Penny Nom lui répond.
	Cows and chickens		2008-06-16
		damebochie pose la question : I got this problem and want to write a system of equation for it: Farmer Joe has cows and chickens on his farm. One day he count 76 legs and 24 heads. How many cows and how many chickens are on the farm? write a system of equations and solve. I don't have any problem to solve it, but I just can;t see how I am going to write this system of equation. Thank you so much for helping? Harley Weston lui répond.
	A quadratic equation		2008-06-03
		Drew pose la question : A solution of x^2-8x=-17 is -4 or -4+I or 4 or 4+i Janice Cotcher lui répond.
	Substitution method		2008-05-30
		taquicia pose la question : 2y-x=3 x=5+y Janice Cotcher lui répond.
	x/4 = 3 1/2		2008-05-30
		Kelsey pose la question : How do you solve for "X" in the problem below? X --- = 3 1/2 4 --Kelsey Victoria West lui répond.
	15 + 0.10n = 0.25n, solve for n		2008-04-24
		monica pose la question : 15 + 0.10n = 0.25n Solve for n. Penny Nom lui répond.
	Find the quadratic equation with roots at (3-i) and its complex conjugate		2008-04-22
		Tiffany pose la question : Find the quadratic equation with roots at (3-i) and its complex conjugate. Penny Nom lui répond.
	x/3 -5 = 3(x-2)		2008-04-20
		Mrs pose la question : I am having trouble helping my son solve the following equation: x/3 -5 = 3(x-2) Penny Nom lui répond.
	A quadratic equation with odd coefficients		2008-04-15
		Manashi pose la question : If p,q,r be any odd integers, then prove that the roots of the quadratic equation px^2+qx+r=0 can't be rational . Stephen La Rocque lui répond.
	A rectangle word problem		2008-04-10
		Nick pose la question : A rectangle is twice as long as it is wide. If the length and width are both increased by 5cm, the resulting rectangle has an area of 50cm^2. Find the dimensions of the original. Penny Nom lui répond.
	A function satisfying f(x) + 2f(1/x) = x		2008-03-25
		Joan pose la question : Let f be a function satisfying f(x) + 2f(1/x) =x for all real numbers (x does not equal 0) a) Find f(1) justify your answer b) Find f(2) justify your answer Penny Nom lui répond.
	Polar coordinates		2008-03-05
		kumi pose la question : 2.Sketch the graph of r=(2)/(1-sinθ). Make sure you show a complete chart demonstrating how you arrive at your sketch, and sketch the graph neatly and clearly with proper labeling. b. change the equation above to cartesian coordinates and identify the type of graph. c.explain which coordinate system gives an easier function to graph and why d.find a function of the form r=f(θ) for a circle centered at (8,π/2) and with the point (0,0) lying on the circle Penny Nom lui répond.
	Parametric equations		2008-03-05
		kumi pose la question : I have made a picture of a football pass 45 degrees with 30yds and height of 7ft and 4ft. But I am just stuck there. I have stared at the worksheet for soo long. I have no idea how to solve this, and I don't even know where this is going (I don't understand how parametric equations work). Can you help me with this problem? 1.The quarterback of a football team releases a pass at a height, h, of 7ft above the playing field, and the football is caught by a reciever at a height of 4ft, 30yds directly downfield. The pass is released at an angle of 45 degrees with the horizontal with an initial velocity of vo. The parametric equations for the position of the football at time t are given, in general, by x(t)=(vo cosθ)t and y=h+(vo sinθ)t-16t^2. a. find the initial velocity of the football when it is released b. write the specific set of parametric equations for the path of the football c.use a graphing calculator to graph the path of the football and approximate its maximum height d. find the time the reciever has to position himself after the quarterback releases the football Harley Weston lui répond.
	Simultaneous equations		2008-02-29
		CONOR pose la question : I was wondering if you could help me with this problem 7x - 5y = -1 3y = 4x Penny Nom lui répond.
	Pythagorean equation		2008-02-27
		Judy pose la question : X^2 + Y^2 = 5^2 Graph all ordered pairs in the coordiante plane that satisfy the Pythagorean equation, x squared plus y squared equals five squared Stephen La Rocque lui répond.
	The slope intercept form of a line		2008-02-17
		chris pose la question : find the slope and y intercept of the line (2x+4)-3y=11(x-1) is this equation in slope point form. Penny Nom lui répond.
	Two job offers		2008-02-10
		Kelly pose la question : Raja has been offered two jobs. Each of these jobs takes 24 weeks to complete. One job pays $3440 every 8 weeks. The other job pays $2700 every 6 weeks. Raja wants to accept the job that pays more per week. Show how to use equations to help Raja make her choice. Penny Nom lui répond.
	The equation of a circle		2008-02-05
		aime pose la question : Find the equation of the circle tangent to 3x+4y-15=0 at P1(1,3) and passing through P2(6,3) and P3(0,5)? Stephen La Rocque lui répond.
	Two equations in x and y		2008-02-01
		leslie pose la question : 6x+8y=40 4x+5y=25 Penny Nom lui répond.
	18/95 x t =3 3/5		2008-01-28
		emily pose la question : 18/95 x t =3 3/5 Penny Nom lui répond.
	Find the slope of the line with equation 7-3y=2x		2008-01-23
		nell pose la question : Find the slope of the line with equation 7-3y=2x Stephen La Rocque lui répond.
	The equation of a line		2008-01-20
		Sara pose la question : The question is: Write the equation of a line that is parallel to y=3x-2 through the point (-5,9). I think the correct equation for this is y=3x+24. But I have to write it in standard form, and I can't seem to figure out how to do that. Please answer soon! Thanks! Stephen La Rocque and Penny Nom lui répond.
	The line through (-22 ;-1) and (-23, -2)		2008-01-20
		Zachery pose la question : i have a slope that equals 1/1 and my coordinates are (-22;-1) and (-23;-2) and i am trying to change it into the equation y=mx+b and the farthest that i've gotten is y=1x_ (i can not find out how to find b.) So i was wondering if you could help me find out what b is because i have got no clue!!!!! Penny Nom lui répond.
	x=sint, y=cos2t		2008-01-14
		Art pose la question : How do i transform x=sint y=cos2t into a function in terms of x and y Harley Weston lui répond.
	Finding the equation of a line from its graph		2007-12-25
		ken pose la question : I have a graph and it is asking me to find the slope of each line, and then write its equation. the graph show a negative slope. Would appreciate the answer if you could show me how to do this question. Kind regards: Ken Stephen La Rocque lui répond.
	System of equations		2007-12-06
		Jenn pose la question : change the equation,x-y=4 to form y=mx+b the solution to the system of equations y=2x and y=-x+3 is Stephen La Rocque lui répond.
	Chicken and goat feet		2007-12-05
		Kim pose la question : Old McDonald raises goats and chickens. The animals have a total of 100 heads adn 360 feet. How many goats and how many chickens does Mr. McDonald have? Stephen La Rocque and Penny Nom lui répond.
	Find the radius of a circle given the center and a point on the circle		2007-11-18
		Raymund pose la question : Find the radius if the center is at (0, -5) and one point on the circle is (2,3) Stephen La Rocque lui répond.
	Why do they use the letter b in y=mx+b?		2007-11-15
		virginia pose la question : why do they use the letter b in y=mx+b? im asking this because my math teacher said he will give extra points to anyone who finds this out first and i was hoping you guys would be the ones who could help. Penny Nom lui répond.
	x^2 + x^3 = n^2		2007-11-14
		Rapin pose la question : x and n are the whole number and less than 100 , x^2 + x^3 = n^2, please help to solve this equation. Penny Nom lui répond.
	A particle moves in the xy-plane		2007-11-12
		Russell pose la question : A particle moves in the xy-plane with X = 2t^3 - 12t^2 + 18t Y = 3t^4 - 28t^3 + 72t^2 find an equation of the line tangent to the given curve at t_0_ = 1 note: t_0_ is t subscript 0 Harley Weston lui répond.
	The rate of change of the concentration of a solution		2007-10-30
		Nicholas pose la question : A barrel initially has two kg of salt dissolved in twenty liters of water. If water flows in the rate of 0.4 liters per minute and the well-mixed salt water solution flow out at the same rate, how much salt is present after 8 minutes? I tried working backwards given the answer but I can't seen to get their answer of ~1.7kg. Any help would be great! Thanks Harley Weston lui répond.
	a/5= b/7= 8/3		2007-10-27
		Kristine pose la question : how do you solve for a and b in this equation: a/5= b/7= 8/3 Penny Nom lui répond.
	4x+8y=32		2007-10-18
		Sara pose la question : Rewrite the following equation: 4x+8y=32 in function form ("solve for y"). Penny Nom lui répond.
	5x + 9 = 3x + 7		2007-10-16
		kristina pose la question : hi im kristina and i cannot figure out how 2 do these multi-step equations 5x + 9 = 3x + 7 i can on getting the wrong answer according 2 the book Penny Nom lui répond.
	Four triangles in a square		2007-10-15
		Kristina pose la question : A square with side lengths of 6 cm is divided into 3 right triangles and a larger isosceles triangle. If the three right triangles have equal area, find the exact area of the isosceles triangle. Stephen La Rocque lui répond.
	Substitution method		2007-10-11
		Kevin pose la question : 3xx+2y=-36-y=11 Stephen La Rocque lui répond.
	Coin jar		2007-10-07
		a student pose la question : Sally empties his jar of coins. It contains $3.75 in nickels, dimes, and quarters. The number of dimes is twice the number of nickels and the number of quarters is three less than the number of nickels. Determine how many nickels, dimes, and quarters were in the in the jar. Stephen La Rocque lui répond.
	Solving four simultaneous equations (system of four linear equations)		2007-10-07
		Johan pose la question : I need some help in solving this question x + 2y - 3z + 4w = 12 2x + 2y - 2z + 3w = 10 0 + y + z + 0 = -1 x - y + z - 2w = -4 Stephen La Rocque lui répond.
	Problems solved using quadratic equations		2007-10-07
		Lisa pose la question : a. Two positive numbers differ by 5. Their product is 234. What are the two numbers? b. The sum of two numbers is 12. Their product is 30. What are the two numbers? c.Two numbers differ by 5. Their squares differ by 55. What are the two numbers? d. The sum of two numbers is 15. Their product is 56. By forming an equation, find the two numbers. Penny Nom lui répond.
	Finding equations, intersection point of two lines at right angles		2007-09-22
		Yaz pose la question : Find the equation of the line joining A(-1,-9) to B(6,120). Another line passes through C(7,-5) and meets AB at rigth angle of D. Find the euation of CD and calculate the co-ordinates of D. Stephen La Rocque lui répond.
	Two equations in two unknowns		2007-09-14
		CAMEILA pose la question : NEED T0 SOLVE THIS EQUATION Y = -2X + 6 Y + 6 = 2x Stephen La Rocque lui répond.
	The slope of a line		2007-09-06
		Danielle pose la question : Hello. I need some help with this: i am supposed to find the equation of a line with a point (2/3,5) and (-5/6,-4) the answer in the book says y=6x+1. My question is how did they get for the slope? Penny Nom lui répond.
	Parametric equations		2007-08-22
		will pose la question : Graph and make a sketch of x = ysquared - 6y + 11 in parametric mode (hint: you need to come up with 2 parametric equations). i have already figured out that the cartesian form of the parametrics will be y = +/- sqroot(x-2) + 3, but i do not know how to produce 2 parametric equations from this. Penny Nom lui répond.
	-31=6w-7		2007-08-21
		Shaneka pose la question : -31=6w-7 Penny Nom lui répond.
	More on the sixth degree equation		2007-08-21
		Farzan pose la question : Equation 1 : (R + (6.67*5.98*10^13/((R^2)*2)))^2 - (R^2) = (7.27*(10^-5)*R)^2 Equation 2 : (6.67*5.98*10^13/(R^2*2))^2 + 6.67*5.98*10^13/R = (7.27*10^-5*R)^2 As you see if we expand the left part of the first equation and simplify, the equations become same, but these two equations have different answers in my math software.The first one has 3 amounts for R, but the second one has 6 amounts. Why are the answers different ? Stephen La Rocque lui répond.
	A sixth degree equation		2007-08-20
		Farzan pose la question : Dear friends I need to solve this equation with an understandable method for high-school students : (6.67*5.98*10^13/(R^2*2))^2 + 6.67*5.98*10^13/R = (7.27*10^-5*R)^2 please solve this problem if you have time. Harley Weston lui répond.
	What feature on a graph shows the solution?		2007-08-19
		San pose la question : To solve the equation 2sinx+square root 3=0, what feature of the graph, in the form y=asinx+b would show the solution? Draw a graph to show the solution. thanks. Stephen La Rocque lui répond.
	Identifying a conic from its equation		2007-08-19
		Robin pose la question : Hi, Do you have any tips how to identify a conic from its equation? Leeanne Boehm and Steve La Rocque lui répond.
	Point-slope form		2007-08-16
		jenny pose la question : write an equation in the point-slope form and the intercept form slope=4,passing through (1,3) slope=8,passing through (4,-1) slope= -5,passing through (-4,-2) slope= -2,passing through(0,-3) Leeanne Boehm lui répond.
	Can you solve this by factoring? 10r^2 - 35r = 10		2007-08-12
		Aranxa pose la question : how do u solve this equation by factoring: 10r^2 - 35r = 10 Stephen La Rocque lui répond.
	Paying off a loan		2007-08-08
		Iona pose la question : I borrowed $6000. 00 from a friend to pay school fee. He said I should not pay back any interest but pay $350.00 monthly after graduation. (1) Make an equation from the above (2) make a graph (3) what is the relationship between the months after graduation and the loan? (4) what is the horizontal and vertical intercept relate to the problem? Stephen La Rocque lui répond.
	Radical equations		2007-08-03
		JC pose la question : I have to solve this radical equation using the power rule; squaring twice. radical 2x+3- radical x+1= 1. Stephen La Rocque lui répond.
	Solve y'' + y = 0		2007-07-28
		Shih-ya pose la question : How do you solve y’’ + y = 0 Stephen La Rocque and Harley Weston lui répond.
	8(y + 3) + 9(y + 2) = y - 3		2007-07-23
		jordan pose la question : 8(y+3)+9(y+2)=y-3 Penny Nom lui répond.
	Finding the radius of an inscribed circle		2007-07-05
		Maria pose la question : I need to find the radius of a circle which is inscribed inside an obtuse triangle ABC. I know all the angles and all the lengths of the triangle. Stephen La Rocque and Chris Fisher lui répond.
	Algebraic EquationsAx+By=C		2007-07-02
		Juan pose la question : The general "Standard" form of an equation is Ax+By=C. Re-Write this equation in slope-intercept (y=mx+b) form. Harley Weston lui répond.
	Simultaneous equations : the Elimination method		2007-06-21
		Patricia pose la question : I need to find the value of X and Y using the Elimination method. 5/x + 3/y=4 25/x-2/y=3 Stephen La Rocque lui répond.
	Solving a literal equation		2007-06-15
		Allen pose la question : Solve each literal equation for the indicated variable. D= C-S/n (solve for s) and A=1/2h (B+b) (solve for b) Penny Nom lui répond.
	Angles of depression		2007-06-13
		Phonda pose la question : The pilot of a small private plane can look forward and see the control tower for a small airstrip. Beyond that is a large factory that is 3 milies from the airstrip. The angles of depression are 12.5 degrees and 4.8 degrees respectively. Find the airplane's altitude, to the nearest ten feet. Stephen La Rocque lui répond.
	15 = 19.2 t (time) - 4.9 t squared		2007-06-11
		Nicole pose la question : 15 = 19.2 t (time) - 4.9 t squared Penny Nom lui répond.
	Solving a quadratic equation using the Quadratic Formula		2007-06-05
		Stuart pose la question : Solve the following quadratic equation: 3xsquared-5x-4=0 Stephen La Rocque lui répond.
	What happens when you have zero's on both sides?		2007-06-05
		Lily pose la question : On the substitution method what happens when you have zero's on both sides of the equation? Is that considered no solution or infinitely many? Stephen La Rocque and Penny Nom lui répond.
	System of equations		2007-05-24
		Chris pose la question : Find all real solutions (x,y,z,w) of the system of equations: 2y= x + x/17, 2z= y + y/17, 2w = z + z/17, 2x= w + w/17 Penny Nom lui répond.
	Finding the equation given three roots		2007-05-21
		Aydee pose la question : 1. find the equation for the roots given: 7,-5,2 2. find the equation for the roots given: -5,2+sqrt3,2-sqrt3 Penny Nom and Stephen La Rocque lui répond.
	Set up two simultaneous equations		2007-05-21
		Admire pose la question : The cost of producing windscreen wipers blades at a factory ais partly fixed (due to operating overheads) and partly dependent on the number of blades produced. It costs $300 to produce 1000, and $600 to produce 5000 blades. How much would it cost to produce 24000 blades? Penny Nom lui répond.
	Find the equation of a line passing through two given points		2007-05-12
		Kenzie pose la question : I am having problems solving an equation of the line passing through (-2,4) and (6,0) Penny Nom and Stephen La Rocque lui répond.
	A tugboat's speed		2007-04-30
		Amanda pose la question : a tugboat must travel 24 miles against a 4 mile per hour current on the Potomac River and return. At what constant speed must the tugboat travel to make the trip in 12 hours. Round answer to the nearest tenth mph. Stephen La Rocque lui répond.
	Finding a parabola's equation by looking at its graph		2007-04-30
		Kenzie pose la question : The graph shows an arrow going upward crossing at the -2 on the x line and crossing the 3 on the x line and the vertex on the -6 on the y line. Stephen La Rocque lui répond.
	Two equations		2007-04-29
		lavon pose la question : I'm having trouble figuring out a linear equation, can you help? - 3x + 2y = 8 3x + 2y = 8 Penny Nom lui répond.
	Ax + By = C		2007-04-18
		Diana pose la question : find an equation in general form Ax + By = C with the following properties passing through points (a,b) and (2a, 2b) Penny Nom lui répond.
	Simultaneous equations		2007-04-16
		kyrie pose la question : simultaneous equation 4x + 3y = 21 2x * y = 8 Penny Nom lui répond.
	Intersection of a line and a circle		2007-04-12
		gaby pose la question : The sum of two numbers is 9. The sum of the squares of the two numbers is 41. Find the numbers. Steve La Rocque and Melanie Tyrer lui répond.
	What is the intensity 5m below the surface?		2007-03-31
		david pose la question : I have this question which I am supposed to set it up and solve as a differential equation. I know how to solve the diffrential equation but I am having hard time understanding this question. Here is the question: The intensity of light in the ocean decreases the deeper you dive. In fact, the rate at which the intensity decreases is proportional to the current intensity. Setup the corresponding differential equation and solve for I(Y), the intensity I as a function of current intensity Y. If the light intensity 2m below the surface is 25% of the intensity at the surface, what is the intensity 5m below the surface. Can you please explain to me what does it mean by current intensity and how do I set this equation up. Thanks for the help. Penny Nom lui répond.
	Solve for x and y		2007-03-27
		anthony pose la question : solve y=4x and x+y=5 Sara Ulmer lui répond.
	Graphing a line		2007-03-23
		mitchell pose la question : Graph each equation. y = 2x + 4 Jaymi Peterson and Haley Ess lui répond.
	Simultaneous equations with fractions		2007-02-28
		Alyca pose la question : Hello Math Central, I am a grade 10 student taking Academic math. Our unit right now is method of substitution and elimination. I'm stuck on this one question that I've been doing forever. Please help =) *For this equation I have to do method of elimination, but it's so much harder with fractions...could some one please explain to me how to do it step by step?* x y 2 -- - -- = - -- 3 6 3 x y 1 -- - -- = 1--- 12 4 2 Steve La Rocque and Ashley Mang lui répond.
	x^3 + y^4 = z^5		2007-02-27
		Mike pose la question : Is there a known solution to the equation: x^3 + y^4 = z^5? This is not for marks. Just a curiosity. Thank you for your time. Stephen La Rocque lui répond.
	Simultaneous equations with envelopes		2007-02-08
		Mick pose la question : There were 17 envelopes bought, some were brown, some were white. The brown envelopes cost one cent more per envelope than the white ones. The total cost was 80 cents. How much of each type of envelope was bought? --Many thanks! Stephen La Rocque lui répond.
	BEDMAS solving for X		2007-02-07
		damian pose la question : Hi, I am having a problem understanding why when using BEDMAS the text book example of the following question has used bedmas and reduced the calculation to 4/3. Text book formula: X/200,000 = (X - 90,000) / 150,000 X = 4/3 * (X - 90,000) X = 360,000 My solution: I always thought that when you do something to one side you do the same to the other. Why would the equation bring the 200,000 / 150,000 down to 4 / 3 I would think it would look something like this. X/200,000 = (X - 90,000) / 150,000 X = 200,000*((X - 90,000) / 150,000) Stephen La Rocque lui répond.
	Write an equation for this		2007-02-07
		BS pose la question : How do you write an equation for this: The difference when 7 less than a number is subtracted from twice the number is 12. And also, what is the number? Penny Nom lui répond.
	Dividing money unequally		2007-02-06
		Linda pose la question : I have a total of $13,826.48. It is to be divided by 15 kids - 2 of the kids only get half of what the other 13 do - how much do the 13 get and how much does the 2 get? Thanks Haley Ess and Steve La Rocque lui répond.
	Equations with fractions		2007-02-06
		Juan and Derek pose la question : 3/4-x=1/2 3/4+1/5x+-1/3=4/5x Penny Nom lui répond.
	Nickels, dimes and quarters		2007-02-05
		Avinash pose la question : Mary has 48 coins made up of nickels, dimes and quarters with a total value of $5.10. She has 4 more dimes than nickels and quarters combined. How many coins of each kind does she have? Use matrix to solve the system Stephen La Rocque lui répond.
	Fencing a field		2007-02-01
		Carol pose la question : "The area of a rectangular field is 1200m^2. Two parallel sides are fenced with aluminum at $20/m. The remaining two sides are fenced with steel at $10/m. The total cost of the fencing is $2200." What is the length of each side fenced with aluminum and steel? Stephen La Rocque lui répond.
	The substitution method		2007-01-31
		Victoria pose la question : how do i solve this problem using the substitution method? 2x-5= -14 -7x+14y= -5 Stephen La Rocque lui répond.
	The elimination method		2007-01-31
		Addrianna pose la question : x-2y=2 3x-5y=7 Stephen La Rocque lui répond.
	11^n +22^n = 55^n		2007-01-29
		Ankit pose la question : 11^n +22^n = 55^n find the value of n? Penny Nom lui répond.
	A boat travels 60 miles downstream in the same time it takes to go 36 miles upstream		2007-01-27
		Liz pose la question : A boat travels 60 miles downstream in the same time it takes to go 36 miles upstream. The speed of the boat in still water is 15 mi/h greater than the speed of the current. Find the speed of the current. Stephen La Rocque lui répond.
	The sum of the digits of a two-digit number is 13.		2007-01-27
		Liz pose la question : The sum of the digits of a two-digit number is 13. If the digits are reversed, the new number is 9 more than the original number. Find the original number. Penny Nom lui répond.
	An algebra exercise		2007-01-24
		Clara pose la question : Given x + 2y = -2 and x - 2y = 18, find: a) x^2 - 4y^2 b) x^2 + 4y^2 Stephen La Rocque and Penny Nom lui répond.
	Points of intersection		2007-01-18
		Mark pose la question : Find the points of intersection of the given pair of curves. 2x - 3y = -8 and 3x - 5y = -13 Steve La Rocque and Haley Ess lui répond.
	How do you write the equation y= 4x-2 in ax+by=c form?		2007-01-17
		Evan pose la question : How do you write the equation y= 4x-2 in ax+by=c form? Penny Nom lui répond.
	Write an equation to represent a function.		2007-01-07
		Noel pose la question : x y -3 -1 -2 0 -1 1 0 2 1 3 2 4 3 5 write an equation to represent a function. Penny Nom lui répond.
	A quuadratic equation		2006-12-22
		Harold pose la question : L=3w-4 A=96Square I used the quadratic equation to solve and my answer is still wrong I convert the square of 1168 to decimal. here is where i start (3w-4) x w=96 could you give me an example Stephen La Rocque lui répond.
	The roots of a quadratic equation		2006-11-16
		Lana pose la question : If p and q are the roots of 2X^2 +3X+7=0, compute pq^3+qp^3. thanks for your help. Penny Nom lui répond.
	An equation for a line		2006-11-16
		Jessica pose la question : (-3,4) m=undefined write an equation for each line given the slope and a point on the line. show your work Stephen La Rocque lui répond.
	The name of an equation		2006-11-13
		Lee pose la question : I am struggling to find the name of the following equation. I remember watching a TV programme introduced by Arthur C Clarke. The programme focused on an equation that gave a wonderful pattern that went on into infinity. Two maths professors discussed this equation.It was described as 'Gods equation' as it was compared to the shape of trees and other shapes in nature. It was named after the inventor/discoverer. If you have any ideas i would be most grateful. Penny Nom lui répond.
	A system of equations		2006-11-13
		Katrina pose la question : solve the system of equations using either the substitution or the elimination method. 2x-3y= -12 and -4x+6y=15 Penny Nom lui répond.
	(4x-5)^2 = -32		2006-11-11
		Tracey pose la question : (4x-5)^2 = -32 Stephen La Rocque and Penny Nom lui répond.
	Simultaneous equations		2006-11-06
		An other pose la question : e^2y-x+2=0 ln(x+3)-2y-1=0 Penny Nom lui répond.
	Balancing equations		2006-10-26
		Della pose la question : With the following equations, how do you know whether you need to apply the multiplication or division rule of equality? 75% t = 18 120% w = 72 Penny Nom lui répond.
	(a^(1/3) – b^(1/3)) ( a^(2/3) + a^(1/3)b^(1/3) + b^(2/3))		2006-10-24
		Julie pose la question : (a1/3 – b1/3) ( a2/3 + a1/3b1/3 + b2/3) Haley Ess lui répond.
	Word equations		2006-10-22
		Samira pose la question : One half of a number is subtracted from the sum of one-third and one-quarter of the same number. If the result is 16, find the number. Stephen La Rocque lui répond.
	A matrix equation		2006-10-14
		Ngozi pose la question : If I have AB = C, where A and C are both 1x6 matrixes and B is a 6x6 matrix, how can I solve for B by dividing C over A? Chris Fisher lui répond.
	Solving a linear equation		2006-10-12
		Eriona pose la question : 6p-5=17. I have to solve the equation. Penny Nom lui répond.
	Plotting a linear equation		2006-10-09
		Jennifer pose la question : I am having problems explaining how to do these problems to my child . graph:2=x-y graph the equation: 2y+x=-3 Penny Nom lui répond.
	X^1/3-X^1/9=60		2006-09-26
		Harini pose la question : I need the answer for The value of X in X^1/3-X^1/9=60. Penny Nom lui répond.
	Is this unsolvable?		2006-09-19
		Al pose la question : Is this unsolvable??? 2xy + 3x^2 - 3y + y^3 = 4x + 3 where y=3. Penny Nom and Claude Tardif lui répond.
	What is the equation?		2006-09-13
		A parent pose la question : HERE ARE THE COORDINATED (0,-3), (1,0), (2,3),(3,6) WHAT IS THE EQUATION? Penny Nom lui répond.
	How much did I spend on the first trip?		2006-09-10
		Alexander pose la question : I have $600 to spend. I take 10 shopping trips. Each trip I spend $10 more than the last trip. How much did I spend on the first trip? Stephen La Rocque lui répond.
	Making and using equations		2006-08-30
		Brooke pose la question : write an equation to model the relationship between these variables. Define the variables you use, and refer to your notes for a variety of formats of equations we have studied this year. week 1: 3 birds infected week 2: 15 birds infected week 3: 75 birds infected week 4: 375 birds infected Stephen La Rocque lui répond.
	The lower half of a sphere		2006-08-30
		Yvette pose la question : I am interested in finding out how to represent the lower half of a sphere in the form of z=f(x,y) with r=2 and a centre point (3,1). Stephen La Rocque and Penny Nom lui répond.
	If 5x + 4y = 6 then x + y = ?		2006-08-18
		Vijai pose la question : If 5x+4y=6 then x+y=? Stephen La Rocque and Penny Nom lui répond.
	x+ 6 / 3 = x+ 6 / x		2006-08-01
		Lynne pose la question : x+ 6 / 3 = x+ 6 / x How do I solve this equation? Penny Nom lui répond.
	I want to calibrate a glucose meter		2006-07-27
		John pose la question : If I have 3 glucose control solutions having: Low - 50 mg/dl Normal - 100 mg/dl High - 330 mg/dl I want to calibrate a glucose meter but I need more than these 3 data points. How can I mix these up to get different concentrations in between 50 and 100, 100 and 330. I would like to mix up different concentrations and put them in test tubes or whatever to do some calibration work. Like 70 mg/dl, 90 mg/dl, etc. More data points should be in between say 50 and 100 since this is normal, 90 mg/dl is considered close to normal. Stephen La Rocque lui répond.
	How old is y = mx + b?		2006-07-05
		Beckie pose la question : I am taking intermediate algebra this summer (Math 95), and have a question for you. My instructor will award extra credit points to any of us who find out how old the formula y = mx+b is. Would you happen to know the answer? Penny Nom lui répond.
	[(400/n)-5](n+ 4)=400		2006-07-02
		Maria and George pose la question : Can somebody solve for n in the following equation please? [(400/n)-5](n+ 4)=400 Penny Nom lui répond.
	Three people go to a store where there is a sale		2006-05-30
		Geocee pose la question : Three people go to a store where there is a sale. One person buys two shirts, one pair of pants and one sweater. The second person buys one shirt, two pairs of pants and two sweaters. The third person buys three shirts and four pairs of pants. Find the price of each item if the first person spent $155 and the second and third person spent $235 each. Stephen La Rocque lui répond.
	Simultaneous Equations		2006-05-24
		Angie pose la question : Question: solve the equations 2x-3y-z=0 3x-2y+z=-5 x+3y-2z=14 for x,y,z Stephen La Rocque lui répond.
	Solving an equation without using algebra		2006-05-01
		Kenneth pose la question : How can the following be solved without using algebra? 10 times some number is 3 times the same number plus 14. Paul Betts lui répond.
	Equation of a line in Ax + By = C form		2006-04-19
		Christopher pose la question : How do you write the equation of a line with a slope of 3/8 and passing through (-4,6) in Ax+By=C form? Stephen La Rocque lui répond.
	x-7=20 and 2x+5=17		2006-04-04
		Janette pose la question : I'm trying to help out my daughter, it has been much too long since I've been in school. The question is x-7=20 and the other question is 2x+5=17. What are the formulas? Penny Nom lui répond.
	2x+5y=3 And -x+3y=-7		2006-04-03
		Lloyd pose la question : simplify 2x+5y=3 And -x+3y=-7 Penny Nom lui répond.
	2x+3y=0 and 3x-y=0		2006-03-14
		Lisa pose la question : my name is lisa I am doing math for work and i have a math problem to solve and i need help with it here is the question 2x+3y=0 and 3x-y=0 this is one question can you help me please Penny Nom lui répond.
	A circle containing two points		2006-03-13
		Skye pose la question : Write the equation of a circle having area 15pi and containing the points (1, 5) and (1, 9). Penny Nom lui répond.
	An equation involving logarithms		2006-03-05
		Chris pose la question : Given that loge y = 0.3logex+1.2 show that y=3.32 x0.3 Penny Nom lui répond.
	25+36+12=52+m, m=		2006-03-02
		Jenny pose la question : 25+36+12=52+m, m= Stephen La Rocque lui répond.
	The graph of y = 2x + 1		2006-02-23
		Geneva pose la question : I'm having trouble with graphing equations like y=2x+1 which is my homework I'm not sure how to graph it. I'm in the 8th grade taking a 9th grade course algebra I. Penny Nom lui répond.
	8 - 5r / 6 = 3		2006-02-15
		Scott pose la question : I was trying to help my daughter with the following problem: 8 - 5r / 6 = 3 Can you give me a quick refresher. Stephen La Rocque lui répond.
	6^(x+1) = 12^(x-3)		2006-02-05
		BB pose la question : 6x+1 =12x-3 Penny Nom lui répond.
	One boundary of a pond is parabolic in shape.		2006-01-20
		Glenn pose la question : One boundary of a pond is parabolic in shape. The boundary passes through the points A(-20,45), B(40,40) and E(30,35). The equation of the parabola is of the form y=ax2+bx+c. Find the equation of the parabola and the coordinates of the vertex of the parabola. Any assistance you could provide would be greatly appreciated. Penny Nom lui répond.
	Simultaneous Equations		2005-12-21
		Matt pose la question : I have these two equations, 336 = 60a + 10b and 432 = 84a + 6b Am I right in saying both a and b are 4.8? Penny Nom lui répond.
	5(x-3)/4 =x+1		2005-12-14
		Jennifer pose la question : I have two problems i am stumped on I don't know how to help my daughter. 5(x-3)/4 =x+1 3(x+12)/5 =x +2 Penny Nom lui répond.
	2/n +4 = 10- 4/3n		2005-12-11
		Jennifer pose la question : 2/n +4 = 10- 4/3n 5(x-3/4) = x+1 Penny Nom lui répond.
	Solve for x		2005-12-04
		Lisa pose la question : 5(x-4)=3(2-3x) Penny Nom lui répond.
	An integer equation		2005-12-01
		Henry pose la question : 3x = 2y + 7 I know the answer: x=9 and y=10, but what are the algebraic steps to solve the equation? Penny Nom lui répond.
	Graphing two lines		2005-11-20
		A student pose la question : About y = 5x + 24 and y = -3x - 8 1. Graph both equations on the same set of axes. When you made your graph, how did you choose the range of x and y values? 2.Find the point of intersection for the graphs. 3. Test the point of intersection you found by substituting its coordinates into the equations. Do the coordinates fit the equations exactly? Penny Nom lui répond.
	Solving a pair of equations		2005-11-10
		Steven pose la question : what is answer to 2 x + y = 1 y = -1/3 x - 4 Penny Nom lui répond.
	3x - 5 - (4x - 8) = 2(2 - 3x) + 29		2005-11-06
		Emma pose la question : I do not get how to "solve for x". For example: 3x - 5 - (4x - 8) = 2(2 - 3x) + 29 Penny Nom lui répond.
	Writing an equation		2005-11-01
		Richie pose la question : A man's electric bill is $23 less than his gas bill. The two utilities cost him a total of $109. Find the amount of his gas bill. Penny Nom lui répond.
	2x - 5x + 6.3 = -14.4		2005-10-16
		Leslie pose la question : How do we solve 2x - 5x + 6.3 = -14.4 Penny Nom lui répond.
	Simultaneous equations		2005-10-13
		Daniel pose la question : 5x + 3y = 22 4x - 7y = -20 Penny Nom lui répond.
	3z-5+2z=25-5z		2005-10-02
		Davis pose la question : 3z-5+2z=25-5z Penny Nom lui répond.
	6x+7=8x-13		2005-09-27
		A student pose la question : show me how to do 6x+7=8x-13 Penny Nom lui répond.
	14p - 8 = 22 + 20p		2005-09-27
		Tiffany pose la question : 14p - 8 = 22 + 20p Penny Nom lui répond.
	A cone with vertex (1,1,2)		2005-09-26
		Brandon pose la question : Find the equation of a double cone with vertex (1,1,2) and which intersects the xy plane in a circle of radius 4. Penny Nom lui répond.
	U'(X) - U(X) = 0; U(0) = 2		2005-09-23
		David pose la question : Out of interest could you please answer the following questions? U'(X) - U(X) = 0; U(0) = 2 and U''(X) - U'(X) = 0; U'(0) = U(0) = 2 Harley Weston lui répond.
	A quadratic		2005-09-06
		Ginger pose la question : I took a pre alg test today. There was a question on it that I am not sure and is bothering me. Can you tell me the answer? x square + 13 + 14 Factor this Penny Nom lui répond.
	x = (y^2 - b^2)/2b		2005-09-04
		Bob pose la question : while looking at x=(y2-b2)/2b on a table I was preparing for a graph, I saw that there is a point where x and y get closer to each other's value. By trial and error I tried to find the point where x=y. I saw a number which looked familiar and I realized it was the square root of 2. and so, if y=b(1+square root of 2) then x=b(1+square root of 2) also, or as x=y. My question is: How can this result x=y when y=b(1+square root of 2) be algebraically derived from the equation x=(y2-b2)/2b without pre knowing it is so? Penny Nom lui répond.
	A system of equations		2005-09-02
		Gina pose la question : How do you interpret the solution of a system of equations by the corresponding graph? Demonstrate your answer by the use of an example. Penny Nom lui répond.
	3A/4 +1=(2A-1)/3		2005-08-21
		Rachael pose la question : I'm doing a practice test question and the answer I keep turning out is different from the answer on the answer sheet. I think I might be forgetting a step. The problem is: 3A/4 +1=(2A-1)/3 The answer is -16. If anyone could explain the steps to me to getting the answer I would be grateful. Whenever I do it I get something completely different. Penny Nom lui répond.
	Solve for x		2005-07-20
		Ed pose la question : (x-1)/3 - 1 = (x + 2)/2 Penny lui répond.
	Discriminant		2005-06-20
		A student pose la question : If a quadratic has real root, its discriminant b2-4ac>=0 Is there any similar condition or method by which you can find whether roots of a cubic equation are real or not? Chris Fisher lui répond.
	y = x+2 and y = 2x - 1		2005-05-03
		Kimberley pose la question : Question: y=x+2 y=2x-1 Penny Nom lui répond.
	16x^2+20x-12x-15		2005-05-03
		Tanya pose la question : how they got (4x+5)(4x-5) from 16x2+20x-12x-15=4x(4x+5)-3(4x+5)=(4x+5)(4x-5) Penny Nom lui répond.
	A quadratic equation		2005-04-27
		Chris pose la question : Solve using the quadratic formula 9x² + 9x - 5 = 0 I don't get the same answer as in the text book which is -3+/- √29/36 Hope you can help.... Penny Nom lui répond.
	Ax + By = C		2005-04-03
		Farzana pose la question : I was wondering if you could please explain to me how I would write the equation of line through the given points [(-3,7), (0,5)] in Ax+By=C form. Penny Nom lui répond.
	tan55.tan65.tan75=tan85		2005-03-30
		Jesus pose la question : My name is Jesus and I´m a secondary student. I´m trying to verify a trigonometric identity but I don´t know how to do it.please help me!!!!!!!!!. The identity is : tan55º.tan65º.tan75º=tan85º (the sign (.) indicates multiplication) Chris Fisher and Penny Nom lui répond.
	A quadratic equation		2005-02-09
		Jess pose la question : 6x+8=-x2 Claude Tardif lui répond.
	By how much is 100 multiplied or divided,...		2005-01-27
		Benedict pose la question : By how much is 100 multiplied or divided, so that whether the number obtained is divided by 5 or 7, there will be a remainder of 1 and so that at the same time, the first quotient is greater by 4 than the second? Penny Nom lui répond.
	cos 2x = sin x		2005-01-22
		Kris pose la question : solve the equation cos 2x = sin x for 0<= x < 360 Penny Nom lui répond.
	2^10 = -1/2^x - 1		2004-12-13
		Randy pose la question : Could you explain to me how the following equation is solved please. 2^10 = -1/2^x - 1 Harley Weston lui répond.
	The substitution method		2004-11-28
		A student pose la question : I Was working and i ran into this problem can you help me solve it using the substitution method? -3x-2y=-10 x+5y=-27 Penny Nom lui répond.
	An ODE		2004-11-10
		David pose la question : I have a question that i really cant do, it is as follows: The ODE dy/dx + 0.5y = 0.5e^(-1.5x) ; y(5) = 2 Solve the ODE subject to the given condition using exact methods and evaluate the solution y for x = 5 x=5.2 x=5.4 x=5.6 x=5.8 x=6 Harley Weston lui répond.
	Solve for a and t		2004-10-23
		Justin pose la question : How do I solve for "a" and "t" in the equations: 1000t= -4000 + 2000t + (1/2)at^2 1000=2000 + at Penny Nom lui répond.
	The integrating factor method		2004-08-05
		A student pose la question : Whilst using the integrating factor method, I am required to integrate a function multipled by another function. say f(t) = exp(kt) and some other function g(t); where exp = exponential and k is some constant. Integral f(t)*g(t) dt or Integral exp(kt)*g(t) dt What would the result of this integral be? I have never met an integral like this before. Would it simply be exp(kt)*g(t)/k? More specifically, the problem and my attempted answer is in PDF format: In my attempted solution, I am unsure about the last two lines I have written out, as it relates to integrating a function multipled by another function. Harley Weston lui répond.
	x^2 = x + 2		2004-07-26
		A parent pose la question : x2 = x+2 My daughter came home with this equation today and although I know the answer is x=2, i have no way of proving it by showing any working out. Penny Nom lui répond.
	Solving some quadratic equations		2004-07-15
		A student pose la question : Could you please solve the following for x x2+6=5x x2+16=8x 2x+21=3x2 Penny Nom lui répond.
	Solving an equation		2004-06-14
		Anthony pose la question : I was hoping that you could help me with this problem. I believe that this is a high school level problem but as an adult who has forgotten the "rules", I am stuck. the equation is this: x=t2/(t1-t2) we know that x=5.73 t1=303 we must solve for t2 Penny Nom lui répond.
	The equation of a line		2004-04-30
		Amy pose la question : Write the equation of the line that contains the point (-4,6) and is perpendicular to the line y=5x+100. Penny Nom lui répond.
	Setting up an equation		2004-04-30
		Matt pose la question : I am trying to determine the dimensions of a 22 megapixel digital camera chip that has a 3:2 ratio. We know then, that: 3x = 2y (or 1.5x = y) and that xy = 22 Beyond this, I don't know how to hook those 2 seemingly unrelated facts together. Penny Nom lui répond.
	x^2/3 - 7 x^1/3 + 12 = 0		2004-04-05
		Jackie pose la question : I am having trouble solving this question for x: 1.) x^2/3 - 7 x^1/3 + 12 = 0 Penny Nom lui répond.
	The substitution method		2004-02-14
		Keisha pose la question : I need to solve this problem by using the substitution method. 3x+y=1 x=2y+5 Please help me understand the method to solve. Penny Nom lui répond.
	Solving an equation		2004-01-03
		A student pose la question : the question is to solve and check equations and the question is 2n + 3n + 7 = -41 Penny Nom lui répond.
	Diamonds and Pearls		2003-12-11
		Lauren pose la question : A crown holds a total of 3080 jewels. It is made up of diamonds and pearls. There are 10 times as many diamonds as there are pearls. How many pearls are there? Penny Nom lui répond.
	Mr.Carter is very cautious		2003-11-26
		Bob pose la question : Mr.Carter is very cautious. He decides to invest in only three stocks: one low stock, one high stock, one medium stock. Given that the expected annual yields are 6% for low stock, 7% for medium stock, and 8% for high stock, he wants his investment in medium stock to be half of his total investment in low and high stock. How much should I invest in each type fo stocks to expect a total annual return fo $650 form my investments? Harley Weston lui répond.
	4(r-2) = r(2+8)		2003-11-20
		Angela pose la question : I not going to give you the problem that I have, but a problem like it. 4(r-2) = r(2+8) I get mix up trying to solve a problem like this could you help me. So that I will be able to handle the ones on my homework. Penny Nom lui répond.
	Systems of equations		2003-11-19
		Scott pose la question : I hope that u can help me....I am a college student taking a class in Pre Calculus.....I have homework due this Friday and it counts a BIG Percentage on my FINAL grade.....I am getting mixed up and can not figure out a few problems.....Please help me..... Method Of Subsitution Problem 1. y- 8x = -5 x(squared) + y(squared) = 25 Problem 2. y = x(squared) - 2x - 6 Y = x(squared) - 4 Penny Nom lui répond.
	The product of the page numbers		2003-11-07
		Morgan and Mom pose la question : You open a book and the product of the page numbers is 12,656. What are your page numbers? Penny Nom lui répond.
	Solve for x		2003-10-27
		Lonnie pose la question : i need help with solving equations and formulas such as -3x+b=6x, for x. I do not understand how you find x. Penny Nom lui répond.
	A parabola		2003-10-24
		Delores pose la question : Given the vertex (4, -2) y intercept = -6 find if/where the parabola crosses the x axis? Penny Nom lui répond.
	Substitution method		2003-09-14
		John pose la question : Hello, my name is john and while I was finishing up my work I stumbled into these problems. a/4-b=-1 a+b=11 and 6a-b=-5 4a-3b=-8 Thanks a lot. I really need some help :) John Penny Nom lui répond.
	The general equation for a sphere		2003-09-11
		Jaidev pose la question : Is there any general equation for a sphere? Penny Nom lui répond.
	Two equations		2003-08-21
		Jennifer pose la question : The following problems have me stuck and any help would be greatly appreciated seeing my text book is doing me no favours: 32a+1 - 283a + 9=0 and 52m - 5m=20 Penny Nom lui répond.
	|x+3| = -15x		2003-07-19
		Nathan pose la question : Without the use of trial and error, is there a way of solving for x where |x + 3| = -15x? I know that x = -0.1875, but how do I find whether x + 3 is positive or not if I did not have this information (In other words, how would I solve whether the x-value was -3 or less, or if it was more than -3)? Claude Tardif and Penny Nom lui répond.
	Setting up a word problem		2003-06-30
		Christie pose la question : A rectangular corral is forty feet longer than it is wide. If the perimeter is 220 feet, determine the length and width of the corral. Penny Nom lui répond.
	Sesame Street on Stage		2003-06-25
		Christie pose la question : Sesame Street on Stage has different ticket prices for adults and for children under 6. Beth and her two children, ages 3 and 4, paid $15 to gain entrance, while Jamie and John Jacobs and their 2-year old daughter got in for $19.50. What is the ticket price for adults? Penny Nom lui répond.
	x-6square root of x +8=0		2003-05-10
		Elizabeth pose la question : x-6square root of x +8=0 Penny Nom lui répond.
	ABCD*4 = DCBA		2003-05-07
		Dee pose la question : In the following problem, if the letters A, B, C and D represent some number, what numbers would they represent so that: ABCD*4 = DCBA Penny Nom lui répond.
	The substitution method		2003-04-14
		Patty pose la question : I need help with the following: 5x - 4y = 13 2y + 3x = -1 Penny Nom lui répond.
	(n+17)(n+7) = 0		2003-03-05
		Janea pose la question : What is the answer to 1. (n+17)(n+7)=0 What is the answer to:2. (y-15)(y-100)=0 Penny Nom lui répond.
	(xy)z = 64		2003-02-26
		Melissa pose la question : How many ordered triples of positive intergers (xyz) satisfy (x[raised to the y])raised to the z = 64? Penny Nom lui répond.
	Two investments		2003-02-07
		A student pose la question : you have $7200 in principal and invest different sums @ 10% and 14%. You receive 920 at end of term. (one year)What amounts are invested at what rate? Penny Nom lui répond.
	Two equations in two unknowns		2003-02-06
		Patrick pose la question : What are all ordered pairs of real numbers (x, y) for which: yx2 - 7x + 12 = 1 and x + y = 6? Penny Nom lui répond.
	Why quadratic?		2003-01-21
		Dan pose la question : Why are equations of the form aX2 + bX + c =0 call quadratic? The quad indicates 4 but the power is 2. Penny Nom lui répond.
	Quadratic equations		2002-12-10
		Katie pose la question : just bugging the hell outta me and I cannot figure it out for the life of me. 1)x-2x-1 =0 Find both roots. You must simplify both of your roots. This equation requires the use of the Quadratic Formula. I have tried everything for this and I am still either getting the wrong answers, and end up getting really frustrated. If you could find the answers and tell me how you did it I would greatly appreciate it! Then the second problem is 2) The square of a certain negative number is equal to 70 decreased by 3 times the number. Find the answer! On this one I set it up but still came out with the wrong answer. So if you could help me on this one I would greatly appreciate it! Penny Nom lui répond.
	The substitution method		2002-11-15
		A student pose la question : Solve by using the substitution method. x = 3y - 1 x + 2y = 9 Penny Nom lui répond.
	Determining a parabola		2002-11-06
		Shelley pose la question : let (0,3) and (1,9)and (-1,1) be given points in a parablola. Determine a b and c Penny Nom lui répond.
	How many trees were planted in March?		2002-10-20
		Allison pose la question : The number of trees planted by the Alpine Nursery in April was 3 more than twice the number of trees planted in March. If 71 trees were planted in april, write and solve an equation to find how many trees were planted in March. Penny Nom lui répond.
	A functional equation		2002-10-14
		Rob pose la question : Let f be a function whose domain is a set of all positive integers and whose range is a subset of the set of all positive integers with these conditions: a) f(n+1)>f(n) b) f(f(n))=3(n) Claude Tardif lui répond.
	A complex quadratic		2002-10-06
		Michael pose la question : I would like to know, how to solve this Complex number: quadratic equation. ix 2 + x -i = 0 Harley Weston lui répond.
	Solving an equation		2002-09-22
		Emanuel pose la question : how do u solve these problems?: 30/x=7+ 18/2x 3m+1/4 = 2- 3-2m/3 Penny Nom lui répond.
	Formulating equtions		2002-09-14
		Theresa pose la question : Hello. In math class we have to formulate equations for certin questions for extra credit. We are allowed to ask anyone and anyone can do it for us and explain it to us. Could you please do that? Here are the questions Jordan has 3 times as much money as Reva. Together they have $44. How much money does each have? The Tigers played 48 games. They won twice as many as they lost. How many did they win? There are 900 students in Sewickley Academy. There are 20 more girls than boys. How many girls are there? A board 400 cm long is cut into 2 pieces. One piece is 66 cm longer than the other. Find the lenght of the shorter piece. Penny Nom lui répond.
	The quadratic formula		2002-09-11
		Kathleen pose la question : im having a problem trying to understand quadratic formulas can u please help me i have problems like 3x2 - 4x - 11 = 0 how do i work out that problem? i have the formula written down but it doesnt seem to register for me. Penny Nom lui répond.
	A solution to an equation		2002-08-28
		A student pose la question : How do you determine whether a pair of numbers is a solution for an equation? If you could identify the specifics steps I need to take to determine whether it is a solution or not would be appreciated! Thanks i.e. x-4=0 Pairs of numbers as possible solutions (4,7) (3,4) (0,-4). Penny Nom lui répond.
	Express 5120 as a sum of consecutive numbers		2002-08-25
		Todd pose la question : Express 5120 as a sum of more than 1 consecutive number. Leeanne Boehm lui répond.
	Two equations		2002-07-26
		Derek pose la question : 1. 3x + 2y = 4 2. -7x + 2y = 24 finding x and y. Penny Nom lui répond.
	25m = 100		2002-04-22
		Megan pose la question : If 25m = 100, Then m equals what number? Penny Nom lui répond.
	Solve for x		2002-04-20
		A student pose la question : solve for x. c-x 2x+b ----- = -------- a c Peny Nom lui répond.
	An augmented matrix		2002-04-20
		A student pose la question : Hi my math teacher asked us to solve an augmented matrix. I am in twelfth grade and need help. The book we are working on is college algebra. Here it is a+2b+c=0 2a+5b+4c=-1 a-b-9c=-5 Penny Nom lui répond.
	3/4n-6=12		2002-04-07
		Diane pose la question : I am in 6th grade advanced math and I just started Algebra. My teacher tries to explain it to me but I just can't get it. I am having difficulty understanding it. Please HELP!!! I will type a problem, if you could answer it and show your work so i can understand it that would be great. Please explain in simple terms. here is a couple problems I am having trouble with, PROBLEM #1 3/4n-6=12 Penny Nom lui répond.
	Pairs of equations		2002-04-04
		A student pose la question : high school level student is asking y=4x x=-4y x+y=5 3x+2y=20 y=x-1 3x-y=4 x+y=3 2x-3y=-9 x+5y=4 3x+15y=-1 . . . Penny Nom lui répond.
	The substitution method		2002-02-24
		Joe pose la question : whats the answer to this question? 3x+y=11 x+2y=-3 its substitution method i am having alot of trouble figuring it out. send the answer as soon as possible. thank you Penny Nom lui répond.
	Algebra review questions		2002-01-14
		A student pose la question : A wildebeast was observed racing a distance of 86.4m in 4.8 seconds. Find the speed of the wildebeast in m/s. 8x - 7 - 5x = 23 7 z - 3 (z + 2) = 26 Penny Nom lui répond.
	Simultaneous equations		2001-12-17
		Matthew pose la question : 4x + y = 4 2x - 3y = 5 what is x and y Penny Nom lui répond.
	A right-angled triangle		2001-12-13
		Pamela, Jeff, Kayleigh and Jacob pose la question : A right-angled triangle has one side that is 8 cm shorter that the hypotenuse. The other side is 1 cm shorter than the hypotenuse. Find the length of the sides. Penny nom lui répond.
	y = zx - x - c		2001-12-11
		Andrew pose la question : Could you please help me work out the value of x where: y = zx - x - c Penny Nom lui répond.
	Two equations in two unknowns		2001-12-04
		Courtney pose la question : y = 3x + 2 y = 4x - 5 solve for x Penny Nom lui répond.
	Slope intercept form		2001-11-27
		A student pose la question : what is slope intercept form? Penny Nom lui répond.
	Undetermined coefficients		2001-11-22
		Hoda pose la question : The equation is: y" - 2y' + y = t et + 4 We need to use The method of Undetermined coefficients. I have tried assuming that the solution is Atet+Bet+C, but all I get is C=4 and I tried (At2+Bt+C)et+D, but again I get 0=0 when I calculate the first and second derivatives, so i get no information on the constants. Any suggestions? Harley Weston lui répond.
	3x-1/2(x-4)+5= -3		2001-11-13
		Tausa pose la question : 3x-1/2(x-4)+5= -3 Penny Nom lui répond.
	A cubic		2001-11-10
		Louise pose la question : x3 + 9x2 - 7x - 63 Penny Nom lui répond.
	1 minus 5(y) equals negative 2		2001-11-10
		Judy pose la question : 1 minus 5(y) equals negative 2 Penny Nom lui répond.
	8w-15 = 3w-10		2001-11-01
		A student pose la question : 8w-15=3w-10, w =????? Paul Betts lui répond.
	Why quadratic for a second degree equation?		2001-10-20
		Jana pose la question : Why do we use the word quadratic to describe second degree equations? Penny Nom lui répond.
	A line in 3 dimensions		2001-10-17
		Murray pose la question : I'm working on a complicated proof and i need the equation for a line in 3 dimensions. Claude Tardif lui répond.
	Investing in a yacht		2001-09-26
		Junior pose la question : Marvin and his four friends wish to invest in a yacht by sharing equally in the cost. As the date of sale approaches, Marvin realizes that if three more people join the partnership, each partner's share would decrease by $18,000. How much does the yacht cost? Penny Nom lui répond.
	Solving trig equations		2001-09-22
		Asad pose la question : Can you please explain to me how to solve trig Equations,e.g sin(x)=x4+12/2+cos(x)=x6+9/3= (if this can be solved) Claude Tardif lui répond.
	Matrix reconstruction		2001-07-19
		Guy pose la question : Is there a way to get the sums of rows, columns and diagonals of an n x n matrix to reconstruct the original matrix? Walter Whiteley and Patrick Maidorn lui répond.
	5+5+5=550		2001-06-11
		Tom pose la question : I am in algebra and my teacher gave us an equation that was not true. she told us that we could only use one line segment(it can't bend turn has to be straight) to make the equation true. here is the equation: 5+5+5=550. i have not figured it out but have tried many things and believe it is not mathmatical but cross a # or sign out.also i forgot you can't put a slash mark through the equals sign. Penny Nom lui répond.
	Common solution		2001-06-02
		Samantha pose la question : Solve for common solution: x+y=6 2x-3y=2 Solve for y in terms of x: 3x-y=4 Penny Nom lui répond.
	Graphing equations		2001-05-01
		A student pose la question : If, for example, 4x2-12x+9=0 and -4x2+12x-9=0, which I'm assuming it does since you can derive that equation from the first, why do those two equations have different graphs? Penny Nom lui répond.
	Solving some equations		2001-04-16
		Justin pose la question : Solve the following equations for x x+7=10 x= x-7=10 x= 3x=7 x= x/3=10 x= . . . . Penny Nom lui répond.
	Where do the lines y=2x-4 and y=x-1 intesect?		2001-04-06
		Bryce pose la question : solve the following problem by setting them equal to each other. Solve for x and y. Where do the lines y=2x-4 and y=x-1 intesect? Penny Nom lui répond.
	(8 + 5)5 = (y + 4)4		2001-04-01
		Kelley pose la question : (8 + 5)5 = (y + 4)4 What is the value of y? Penny Nom lui répond.
	Solving an equation		2001-03-27
		Jennifer pose la question : How would I solve this equation? 1.6 = 2x/(.1-x) - the equation in parenthesises is raised to the second power. I know you take the square root of both sides, but there is where I get lost. Leeanne Boehm lui répond.
	Systems of equations		2001-03-16
		joy pose la question : How do u solve problems using systems of equations? ~ finding x and y~ ex: 26 = 3x - 2y 42 = 4x + y Penny Nom lui répond.
	Quadratic equations		2001-03-11
		Philip pose la question : I am a student in the UK and i am in secondary school and i am doing my GCSE next year. here are my questions: solve the following equations correct to 2 decimal each time. [1] 2xsquared + 5x = 1 [2] 3xsquared(2x+1)=1 [3] xsquared + 7x + 2 = 2x + 4 [4] 5xsquared - 3x = xsquared + 4 Penny Nom lui répond.
	The substitution method		2001-03-05
		A student pose la question : Solve each system of equations by the substitution method. Show your work. y = 8 7x = 1 - y y = x - 1 4x - y = 19 Penny Nom lui répond.
	What is the value of n?		2001-03-03
		Adam pose la question : When I add n to 7 and then divide my answer by 4,I get 5. What is the value of n? Penny Nom lui répond.
	Solve for the variable		2001-02-28
		Ashley pose la question : I've got 2 questions. We (my dad and I) can not figure them out. please help me. 21 = 9 - 2 (4a + 2) and I am supposed to find out what the variable is. 2/3 n + 3/8 n = 15/16 (those are fractions). Again, I need to find out what the variable is. Penny Nom lui répond.
	Solving Equations		2001-02-23
		Stephanie pose la question : Do you know who came up with solving equations? Do you have any web-sites that can give me good information on solving equations? Do you know any history on solving equations? Do you know what solving equations is used for? And finally............Sorry about all of the questions :) Has the form of solving equations changed from the time it came out to now? Juci McDonald lui répond.
	g(g+5)=0		2001-02-20
		Jenna pose la question : g(g + 5) = 0 Penny Nom lui répond.
	A quartic equation		2001-02-15
		George pose la question : Let P(x) = x4 + ax3 + bx2 + cx + d. The graph of y = P(x) is symmetric with respect to the y-axis, has a relative max. at (0,1) and has an absolute min. at (q, -3) a) determine the values for a, b c, and d using these values, write an equation for P(x) b) find all possible values for q. Harley Weston lui répond.
	Linear equations		2001-02-13
		Jamie pose la question : I have a question how do you do linear equation? Penny Nom lui répond.
	Completing the square		2001-01-12
		Jacky Lam pose la question : A friend told me that completing square not only can find the vertex but also the roots of a quadratic equation. Is it possible? How? Can you show me how to find the roots of the following equation using completing the square? 8x2 + 8x + 4 Penny Nom lui répond.
	Blood flow and age		2001-01-11
		Gayle pose la question : I don't understand the second part of this problem Here is the first part that was correct. A 35yr old has 100% blood flow. A 65yr old has 64% blood flow. Find the rate of change per yr in the percent of blood flow. (This part is correct) m=(64-100)/(35-65)= -36/30= -1.2 per year of blood flow. Now, here is the second part I DON'T UNDERSTAND! .Let b represent the percent of blood flow and a represent a person's age. Write an equation that you could use to predict the percent of blood flow for a person of any age over 35. Penny Nom lui répond.
	x^5 + y^5 + z^5 = w^5		2001-01-11
		Samuel Brown pose la question : x5 + y5 + z5 = w5 I have no idea whether or not this is possible. Claude Tardif lui répond.
	Solving x - sin(x) = constant		2000-12-29
		Keith Roble pose la question : If x is in radians, how do you solve for x, where: x-sin(x) = constant? Harley Weston lui répond.
	Solving an equation		2000-12-29
		Bob pose la question : Would you be able to help me solve this math equation.. Solve for b, 2 [b - (q + s)] / q = s Penny Nom lui répond.
	A piecewise linear equation		2000-11-24
		Jacky pose la question : There is a light bulb and it is given that the light bulb cost $0.75 and the cost of operating it is $0.0081 per hour. From the information give, I came up with the linear equation: Let c be total cost and Let h be hours used. Therefore: c = 0.0081h + 0.75 represents the total cost of the light bulb and the electricity. However, the second part of the question added the fact that the light bulb will only last for 800 hours. If the light bulb is replaced as soon as it burns out exactly after every 800 hours, how can I write an equation that represents that? Is it possible? What would it look like on the graph. Harley Weston lui répond.
	Solving an equation		2000-11-14
		Heather pose la question : 4x-3 = 3x+4 these kinds of problems i dont get but everything else in my math class i have got. i just dont understand it. Penny Nom lui répond.
	Connecting to a water line		2000-10-20
		Vanja pose la question : My question is...A house is to be connected to a new water main that runs along the line y=2/3x-1. The connection point at the house has coordinates (2,9), where the units represent metres. What lenght of plastic pipe is needed to connect to the water main at the closest point? Penny Nom lui répond.
	2-step equations		2000-10-11
		Jen pose la question : i don't get how you find the answer to these equations 140= -4 -12e x/-2 + 6 = 4 Penny Nom lui répond.
	Buying art supplies		2000-09-18
		Travis pose la question : An art teacher buys exactly 100 items at this sale, and the total cost before tax is $100. She buys at least one of each item. How many of each item does she buy? Markers $0.50 Sketch Pads $3.00 Paint Sets $10.00 Denis Hanson lui répond.
	Two linear equations		2000-09-14
		David Dean pose la question : 2a + 1b = 3.39 3a + 3b = 6.59 What formula do I use to find what a = ? Harley Weston lui répond.
	A equation with a square root		2000-09-03
		Lea pose la question : Please help with 2 plus the square root ( and under it has x plus 1) = 6 Thank you Penny Nom lui répond.
	Solving an equation		2000-08-26
		Patrick pose la question : My question is how would u do a problem like this.......... [2x-37] =15?....u have to solve it for absolute value equations....???? Harley Weston lui répond.
	Slope		2000-08-19
		John K. DePonte pose la question : My question is to why the variable "m" was chosen to represent the slope of a linear equation. I always told my class to think of "m" for "m"ountain slope. But what is the real reason for this? Penny Nom lui répond.
	Two linear systems		2000-08-01
		A student pose la question : please help me with this homework question. 5/x + 6/y= 19/6 3/x + 4/y =2 hint: let a = 1/x and b = 1/y substitute these expressions into the system to find a and b. Then find x and y. This is a question I answered wrong on a test: solve the given system for x, y, and z. Express your solutions in terms of a, b, and c. Penny Nom lui répond.
	(mn + m + n)/(m^2 + n^2) = 1		2000-07-24
		William pose la question : Find all pair of positive integers m and n such that mn + m + n divides m2 + n2 = 1. Peny Nom lui répond.
	An equation involving x to the x		2000-07-22
		Joy Peter pose la question : I am joy, a teacher teaching Maths at the secondary level and while solving a sum came to this stage when i got xx (1 + log x) = 0, by which we can conclude that xx = 0 or 1 + log x = 0. If xx = 0, than what should be the value of x? I feel that the value of x should then be 0 (zero) but then how do I explain this to the students as we also know that anything to the power of 0 is 1 but here 0 raised to 0 is 1. If this is not defined then how do I explain this? Penny Nom lui répond.
	n! = 42(n-2)!		2000-07-21
		Damon Bailey pose la question : Solve n! = 42(n-2)! Paul Betts lui répond.
	The equation of a parabola		2000-05-22
		Ian Forsyth pose la question : Given the points A(0,0) B(60,10) C(24,d) find the equation of the parabola. leave the equation in terms of x, y and d if the general form of a quadratic is y = ax2 + bx + c. Penny Nom lui répond.
	A matrix equation		2000-05-14
		A student pose la question : Right now, we are dealing with matrices and we are supposed to solve the following problem on our graphing-calculators: 2a+3b-4c+d=20 a-2b+3c-5d=-14 3a+4b-2c+3d=19 5a-b+6c+4d=-5 Penny Nom lui répond.
	4x - [2x -(3x - 2)] = 13		2000-05-13
		Teresa pose la question : I need to find the following equation. 4x - [2x -(3x - 2)] = 13 Penny Nom lui répond.
	Finding a Quadratic Equation given the roots		2000-04-16
		A secondary student pose la question : How do I find the equation for the quadratic with roots at 2-i and its complex conjugate? Harley Weston lui répond.
	Taxis in Chicago		2000-03-27
		A high school studenthigh school student pose la question : Suppose that taxis pick up and deliver passengers in Chicago, which is divided into three zones. Records kept by the drivers show that of the passengers picked up in Zone 1, 50% are taken to a destination in Zone 1, 40% to Zone 2, and 10% to Zone 3. OF the passengers picked up in Zone 2, 40% go to Zone 1, 30% to Zone 2, and 30% to Zone 3. Of the passengers picked up in Zone 3, 20% go to Zone 1, 60% to Zone 2 and 20% to Zone 3. Suppose that at the beginning of the day, 600 of the taxis are in Zone 1, 100 in Zone 2, and 300 in Zone 3. What is the distribution of taxis in the various zones after all have had two riders? Harley Weston lui répond.
	A system of equations in five unknowns		2000-03-20
		Will pose la question : I have been having some problem with the following question for some time. I would appreciate any help on solving the problem or a solution. Q: Assume that a system of equations in the unknowns x1, x2, x3, x4 and x5 when converted to row echelon form gives . . . Penny Nom lui répond.
	Simultaneous equations		2000-03-11
		Laura Molck pose la question : My name is Laura Molck and I am in Year 11 in Australia. Please help me with the following. I know that they are all simultaneous equations which I can do but I have trouble with the formulae to work the equations. Can you please help!! 1. A tent manufacturer produces 2 models, Outback and Bushwalker. From earlier sales records it is known that 20% more of the Outback model is sold than the Bushwalker. A profit of $200 is made on each Outback sold, but $350 is made on each Bushwalker. If during the next year a profit of $177,000 is planned how many of each model must be sold? Penny Nom lui répond.
	Systems of linear equations		2000-03-10
		Ann Marie Devereux pose la question : hi there!!, I guess I have a problem!!! 3x+4y=10 (over) 4x+y=9 2x=5y+3 (over) x=3y+1 Penny Nom lui répond.
	Some equations		2000-03-08
		Maria pose la question : Hi, could you help me with these questions: Find x & solve 7-2x/3=9 4x+3/5=-2 6-2x=14 -1/7x=-4/3+1/6 Penny Nom lui répond.
	A mixture problem		2000-03-06
		Rebecca Edwards pose la question : A tank in which cholocate milk is being mixed contains a mixture of 460 liters of milk and 40 liters of chocolate syrup initially. Syrup and milk are then added to the tank at the rate of 2 liters per minute of syrup and 8 liters of milk per minute. Simultaneously the mixture is withdrawn at the rate of 10 liters per minute. Find the function giving the amount of syrup in the tank at time t. Harley Weston lui répond.
	Midpoints and endpoints		2000-02-15
		Jessica Sipes pose la question : I need to know how to find and endpoint using the midpoint and the other endpoint. Penny Nom lui répond.
	Can't make an equation!		2000-01-30
		Maggie Clarke pose la question : An estate is to be distributed among the wife, 3 children and 2 grandchildren. The children will each receive 2x as much as each grandchild, and the wife will receive 4x as much as each child. If the estate amounted to $115,000, how much will each person receive? Penny Nom lui répond.
	Quadratic		2000-01-26
		Karen Johnson pose la question : What is the reasoning behind the title quadratic equation? Penny Nom lui répond.
	Ax + By = C		2000-01-18
		Fatiha Khanboubi pose la question : I was wondering if you could please explain to me how I would write the equation of line through the given points [(4,1), (6,3)] in Ax+By=C form. Harley Weston lui répond.
	Solving an equation		2000-01-17
		Shelley's Mom pose la question : My daughter has an assignment in math that includes this equation: -6b+5= -10 I've tried to help her with a scale. We've figured that you subtract 5 from each equation so its not -6b = -15. Is this correct and can you help us figure out the next step? Penny Nom lui répond.
	Parallel lines		2000-01-12
		Lori pose la question : Find an equation of the line parallel to the given line containing the given point. x + y = 2; (1,2) We know parallel line have the same slope and we know the answer y = -x + 3. Penny Nom lui répond.
	Derive the quadratic equation		2000-01-01
		Thuy pose la question : My teacher asked us this question in which i can't understand when she asked to derive the quadratic equation. What does this mean? Penny Nom lui répond.
	Solving a cubic equation		1999-12-30
		Natalia pose la question : How can I solve: 2 x3 - x2 + x - 2 = 0 ??? Penny Nom lui répond.
	Solve for v		1999-12-09
		Beth pose la question : 1-3/4(v+2)=-5 Penny Nom lui répond.
	Systems of equations		1999-12-06
		Roger Hornbaker pose la question : I am having problem figuring out x and y solutions. 5x + y = 4 3x - y = 4 3x + 2y = 6 - 3x + y = 0 Penny Nom lui répond.
	The elimination method		1999-12-02
		Jennifer pose la question : Could I get an answer to this one: 2x+5y=36 3x+2y=32 I have to use the Elimination method, as I already know how to do Substitution. How do I begin and show my work? I'm attempting to eliminate the values for y. Penny Nom lui répond.
	How wide is the well?		1999-11-24
		Chris Baranski pose la question : There is a well and in the well there are 2 sticks one is 2 meters long the other is 3 meters long and they are opposite to each other. They are leaning against the wall of the well. The place where they touch is 1 meter of the bottom of the well. How wide is the well? Chris Fisher lui répond.
	Linear models		1999-11-09
		Helen Moreno pose la question : What is a linear model? Harley Weston lui répond.
	Multiple step problems		1999-11-09
		Maria Rainsdon pose la question : I don't understand how to solve these multiple step problems. I wasn't there when my teacher explained it and I am really lost. Here is one of the probs I don't understand: 3m+6=-m-6. Penny Nom lui répond.
	Equations with fractions		1999-10-10
		Lori pose la question : I'm a secondary student. How would you figure out a problem such as t-2/t =14/3t - 1/3. The book gave one example but it is really easy. The work YOU have to do is totally different. You don't have to tell me the answer just how to do such problems like these. Penny Nom lui répond.
	sin x = x/10		1999-10-07
		Amandeep Grover pose la question : Solve the equation sin x = x/10 Harley Weston lui répond.
	-8*-(-5a)=15		1999-09-22
		Shelby pose la question : -8*-(-5a)=15 i cannot get this question!! please help me!! Harley Weston lui répond.
	Why is slope designated m?		1999-08-18
		Peter Komlos pose la question : Why is the slope of a line is designated by the letter "m"? Penny Nom lui répond.
	Parametric Equations		1999-08-06
		Nicholas Lawton pose la question : Show that an equation of the normal to the curve with parametric equations x=ct y=c/t t not equal to 0, at the point (cp, c/p) is : y-c/p=xp^2-cp^3 Harley Weston lui répond.
	Graphing a linear equation		1999-05-27
		Dylan Bradley pose la question : Im in Grade ten and am doing linear equations, I cann't figure out how to make a chart for questions like y = -2x + 3 Penny Nom lui répond.
	Question about 3rd degree polynomials		1999-04-23
		Patrick Bryan pose la question : What is the general solution to the equation with the form: a*x^3 + b*x^2 + c*x + d = 0 I have once seen a solution to this a few years ago, but I do not recall if it was a general solution. What I do know, is that you could simplify this equation to: a*x'^3 + p*x' + q = 0... Doug Farenick lui répond.
	Parallel and perpendicular lines		1999-04-23
		Crystal Pilling pose la question : My name is Crystal Pilling and I am in 9th grade algebra. We are currently studying parallel and perpendicular lines. I am having trouble with this problem: 3/4x - 5y= 16, (5,-6) I have to find a line that is perpindicular to this line on a graph. HELP ME PLEASE!!!!! Penny Nom lui répond.
	Shopping at Wegman's		1999-04-22
		Stan pose la question : Joanne, Steve, Pat, Alice, Joan, and Bill go to Wegman's at the same time. Joanne buys 2 gal of milk, 1 dozen oranges, 8 apples, and 2 lb. of ground beef, paying a total of $13.24. Steve buys 3 qts. of milk, 5 lbs. of ground beef, 10 lb. of potatoes, and 2 bags of mixed vegetables, paying a total of $16.95. Pat buys 3 gal. of milk, 2 dozen oranges, 1 dozen apples, 5 lb. of potatoes, and 5 bags of mixed vegetables, paying a total of $25.09. .... Find the cost of: 1 qt. of milk, one orange, one apple one lb. of ground beef, one lb. of potatoes, and one bag of mixed vegetables. Penny Nom lui répond.
	A ladder problem		1999-04-22
		Michael Blade pose la question : There is a cube box 3feet x 3feet x 3ft resting against a vertical wall on level ground. Resting against the outside corner of the box is a ladder 10 feet tall, this ladder is of course resting on the ground but also against the outside corner of the box and rests on the wall. The question- the ladder is divided into two unequal section bounded by the box to the ground and the box to the wall. what are those dimensions? Penny Nom lui répond.
	y=mx+b		1999-04-15
		Selena Royle pose la question : When solving a problem on slopes,and in the formula y=mx+b what do the M and B stand for? Why M and B? Penny Nom lui répond.
	Grade 10 math		1999-04-08
		Ron pose la question : the type of question i'm having trouble with is 5(2x-1)=3(x-4) Penny Nom lui répond.
	Quadratic equations		1999-03-31
		Ken Niebergall pose la question : #1 a2 - 10a = 2a - 36 #2 t(t - 5) = 5 (t - 5) #3. (x + 4)(x - 3) = 8 Thanks. Jack LeSage and Penny Nom lui répond.
	Standard Form		1999-03-30
		Pam pose la question : How do you put this equation into standard form? y=3.572x+5.409 Would you please put this equation in this form Ax+Dy+C=0 Penny Nom lui répond.
	An airplane problem		1999-03-08
		B.M.R. pose la question : A plane left New York and headed East to its destination 3600 miles away across the Atlantic. On the way back its speed was boosted by a 50 mph tail wind and it arrived an hour early. What was its normal speed? Jack LeSage lui répond.
	Linear Equations		1999-01-16
		Casie Tomney pose la question : My dad and I have been trying to figure, how to solve for x on any of these problems my teacher gives us. The problem is: 2h/3 + 1/2 = 5h/6 - 3/4 Thanks!!!!!!!! Jack LeSage lui répond.
	Intersection of Planes		1998-12-03
		Lindsay Fear pose la question : My name is Lindsay Fear. I am an OAC student (which is the Ontario equivalent to Grade 12 in most other states and provinces). I am in an Algebra and Geometry course and am currently studying a unit on equations of planes. Our teacher has given us this question that my friend and I have attempted several times, but we are still unable to solve it. My teacher has also suggested using the internet as a resource. The question is: Prove that a necessary condition that the three planes -x + ay + bz = 0 ax - y + cz = 0 bx + cy - z = 0 have a line in common is that a^2 + b^2 + c^2 + 2abc = 1 Walter Whiteley lui répond.
	Algebra		1998-11-25
		Casey pose la question : yeah my son brought home a math worksheet and he was wondering and me too if u could help him and me out . he has problems like this 4n+9=7n+2= ??? and he has to show work so if u could help us out that would be great Jack LeSage lui répond.
	Linear systems of equations		1998-11-16
		Crystal Girvan pose la question : My name is Crystal Girvan.Im in grade 11. I have a question.We are solving linear systems of equations: comparison method. My questions is. it says a)use the method of comparison to solve this system a=b-1, 3a+ b=3 b) verify your solutin in a I dont understand it. please help Jack LeSage lui répond.
	The Left Side of a Parabola.		1998-10-20
		Shay pose la question : Find the parametrized equation for the left half of the parabola with the equation: Y=x^2-4x+3 Chris Fisher lui répond.
	A Linear System		1998-10-08
		Jason Bussey pose la question : The linear systems with the following pattern all have the same solution. Is their some kind of reasoning as to why this is so? 2x+3y=4 3x+4y=5 4x+5y=6 5x+6y=7 The solution is always x=-1, y=2 Thank you Jason Penny Nom lui répond.
	A Horizontal Line		1998-09-23
		Tess Warer pose la question : Find the equations of a line through (-1,-5) and parallel to the X-axis. Harley Weston lui répond.
	Grade 9 Algebra		1998-06-07
		Tarah Kostenko pose la question : I am a grade 9 student and I cannot figure out how to solve these two similar problems. can you please help? -3(y-1/2)=1/2 also -2/3(x + 1)=6 I don't come up with the same answers as the book and I can't figure out what I'm doing wrong. Thank you, Harley Weston lui répond.
	Graph question		1998-05-12
		Rose Seminary pose la question : Why is the point of intersection of two lines the solution to the corresponding system of equations? Penny Nom lui répond.
	Seed Problem		1998-03-26
		Jody A. Johnson pose la question : Seed Problem: The height of an amazing plant grown from a seed varies linearly with the time it has been in the ground. After six days it is 6cm tall and after 60 days it is 15.8m (1580 cm) tall. Write the particular equation giving the height as a function of time. Find the intercepts and explain them. What would be the height in one year? How long would it take for the plant to grow to a height of 1km? I'm having a problem with this equation. Could you please help. Thank you. Penny Nom lui répond.
	Y-intercept		1998-02-27
		Don Trumpet pose la question : What is the Y-intercept for the problem:Y = -2(x+2) + 9 Harley Weston lui répond.
	Intersecting Lines.		1998-02-10
		Erik Heppler pose la question : My typewriter frequently makes mistakes. Suppose I gave you the following system of equations to solve: 35.26X + 14.95Y = 28.35 187.3X + 79.43Y = 83.29 When I looked back, I realized that I meant to use 14.96 as the "Y" coefficient in the first equation instead of 14.95. Solving the system using 14.95 and then solving another system using 14.96 with all other values the same both times results in the intersection points (1776, -4186) and (-770, 1816) respectively. How can that be? Penny nom lui répond.
	Find the Numbers.		1997-12-28
		Sandy C pose la question : The sum of the squares of two numbers is 53. Twice the greater, minus the lesser is 11. Find the numbers. Penny Nom lui répond.
	A problem with arccos.		1997-06-09
		Vanessa Chan pose la question : Prove: arc cos4/5 + arc cos (-5/13) = arc cos (-56/65) Harley Weston lui répond.
	The General Equation of a Parabola		1997-05-28
		Michelle pose la question : My name is Michelle and I am a 10th grade student in algebra 2 w/ analysis. I am doing a report on parabolas and I need to know what the general equation is. I've looked in books and keep finding different ones! I also need to know how they can be used in nature. Thank you so much for your time. I really appreciate it! - Michelle Harley Weston lui répond.
	Equation of a line		1997-04-08
		Susan Gregson pose la question : I am a secondary school teacher. My students and I would like to know why the letters m and b are traditionally used to stand for slope and Y-intercept in the standard form of an equation. Was this an arbitrary choice? Who made it? Are the letters from Greek ot Latin words? Harley Weston lui répond.
	Why QUADratic?		1997-03-19
		Paula Miller pose la question : A student today asked me why a quadratic, with highest power of degree 2, was called a QUADratic. We're awaiting the answer with baited breath! :) Chris Fisher and Walter Whiteley lui répond.
	A Functional Equation.		1997-02-26
		Ronald Lui pose la question : Find all functions f:S --> S statisfying the two conditions: 1)f(x+f(y)+xf(y))=y+f(x)+yf(x) for all x and y in S 2)f(x)/x is strictly increasing on each of the interval -1 Saroop Kaul and Chris Fisher lui répond.
	Cardano's method		1996-03-11
		Mike Gorski pose la question : What is Cardano's method for finding the roots of a cubic equation? Harley Weston lui répond.

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