







A scenario for a linear equation 
20210119 

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. 





A word problem involving linear equations 
20200622 

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. 





A rectangular garde 
20200410 

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 
20200410 

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. 





The equation of a line 
20200105 

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. 





Two linear equations with a fraction 
20190426 

Asha pose la question : 2x=3y …1
x2+4/3(y+1) ...2
note: … is equation Harley Weston lui répond. 





A linear equation 
20190211 

Nick pose la question : What's a linear equation? Penny Nom lui répond. 





Simultaneous equations with fractions 
20170909 

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. 





The dimensions of a rectangle 
20160725 

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. 





The temperature inside and outside a greenhouse 
20160722 

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 
20160722 

kanesh pose la question : p/2+q/3=3
p/4+2q/3=3 Penny Nom lui répond. 





A system of linear equations 
20160124 

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
xy=9
x+z=12
zn=14
y+n=2 Penny Nom lui répond. 





A graph of the water level of a river 
20160105 

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. 





Constructing simultaneous linear equations 
20151228 

Deborah pose la question : Linda thinks of a twodigit 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 
20151213 

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. 





Two quadratic equations 
20141120 

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+Y22XY=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. 





Two nonlinear equations 
20140126 

Naryn pose la question : (1÷x) + (1÷y) = (7÷12)
xy = 12 Penny Nom lui répond. 





A linear equation 
20131226 

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=2x1? 
20131207 

cindy pose la question : How do I graph y=2x1? Penny Nom lui répond. 





A line through (5, 1) 
20131008 

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 word problem involving a fraction 
20121012 

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 
20121007 

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. 





Problem solving 
20120815 

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=3x43underroot2 
20120709 

Eshraj pose la question : 2x+underroot2=3x43underroot2 Penny Nom lui répond. 





The equation of a line 
20120326 

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. 





Linear equations 
20111006 

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 (madeup 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. 





An equation in the form Ax+By=C 
20110728 

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 
20110713 

Simon pose la question : I would like to ask if you would be able to explain : linear equation: 2 1/2 (X1)  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. 





A linear equation with the variable on both sides 
20100116 

dog pose la question : 4x9=7x+12 Penny Nom lui répond. 





A linear equation with fractions 
20091231 

Michelle pose la question : How would I solve: (2)(1/2x + 5) = (2)(8)? Penny Nom lui répond. 





The method of substitution 
20090917 

laura pose la question : ok! i really need help with this question plz help!!
x=  4y +5
x+2y = 7 Penny Nom lui répond. 





10x8 /3 =6x+24 /5 
20090916 

Heidi pose la question : 10x8 /3 =6x+24 /5.....I know the answer is 7/2 but how do I get there? Penny Nom lui répond. 





Simultaneous equations 
20090828 

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=2x1 
20090828 

MARICELA pose la question : Need help of how to work this problems
y=2x+1 and y=2x1
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. 





Linear equations 
20090823 

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. 





(x + 1) / 3 + (x + 2) / 7 = 2 
20090522 

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. 





Stairway construction 
20090502 

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. 





An infinite number of solutions 
20090324 

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. 





The substitution method 
20090218 

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=x3 How can i solve this using the substitution method? Penny Nom lui répond. 





A line parallel to a given line 
20090218 

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. 





Using y = mx + b 
20090126 

Caroline pose la question : How do you write a symbolic representation using the y=mx+b method? Robert Dawson lui répond. 





Solve for x 
20090116 

maritza pose la question : 5=3(x2)= Penny Nom lui répond. 





The table of values for y=3x10 
20090109 

Jade pose la question : How can I know the value of x for y=3x10 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. 





A line in slope intercept form 
20081208 

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. 





Solve 3x +5= 4x10 
20081122 

Nikko pose la question : HELP please how do I solve these type of questions? 3x +5= 4x10 or 4x +10= 6x8 Penny Nom lui répond. 





A linear equation with fractions 
20081007 

Christopher pose la question : 1/6(x18)+1/8(x+8)=x9 Penny Nom lui répond. 





Substitution method 
20080530 

taquicia pose la question : 2yx=3
x=5+y Janice Cotcher lui répond. 





x/4 = 3 1/2 
20080530 

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 
20080424 

monica pose la question : 15 + 0.10n = 0.25n
Solve for n. Penny Nom lui répond. 





x/3 5 = 3(x2) 
20080420 

Mrs pose la question : I am having trouble helping my son solve the following equation:
x/3 5 = 3(x2) Penny Nom lui répond. 





Finding equations, intersection point of two lines at right angles 
20070922 

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 coordinates of D. Stephen La Rocque lui répond. 





Solve for x and y 
20070327 

anthony pose la question : solve y=4x and x+y=5 Sara Ulmer lui répond. 





Nickels, dimes and quarters 
20070205 

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. 





A boat travels 60 miles downstream in the same time it takes to go 36 miles upstream 
20070127 

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 twodigit number is 13. 
20070127 

Liz pose la question : The sum of the digits of a twodigit 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 
20070124 

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 
20070118 

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. 





Solving a linear equation 
20061012 

Eriona pose la question : 6p5=17. I have to solve the equation. Penny Nom lui répond. 





Plotting a linear equation 
20061009 

Jennifer pose la question :
I am having problems explaining how to do these problems to my child .
graph:2=xy
graph the equation: 2y+x=3
Penny Nom lui répond. 





I want to calibrate a glucose meter 
20060727 

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. 





Three people go to a store where there is a sale 
20060530 

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. 





x7=20 and 2x+5=17 
20060404 

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 x7=20 and the other question is 2x+5=17. What are the formulas? Penny Nom lui répond. 





2x+5y=3 And x+3y=7 
20060403 

Lloyd pose la question : simplify 2x+5y=3 And x+3y=7
Penny Nom lui répond. 





The graph of y = 2x + 1 
20060223 

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. 





5(x3)/4 =x+1 
20051214 

Jennifer pose la question :
I have two problems i am stumped on I don't know how to help my daughter.
5(x3)/4 =x+1
3(x+12)/5 =x +2
Penny Nom lui répond. 





2/n +4 = 10 4/3n 
20051211 

Jennifer pose la question :
2/n +4 = 10 4/3n
5(x3/4) = x+1
Penny Nom lui répond. 





Solve for x 
20051204 

Lisa pose la question : 5(x4)=3(23x) Penny Nom lui répond. 





Graphing two lines 
20051120 

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. 





2x  5x + 6.3 = 14.4 
20051016 

Leslie pose la question : How do we solve 2x  5x + 6.3 = 14.4 Penny Nom lui répond. 





Solving an equation 
20040614 

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/(t1t2)
we know that x=5.73
t1=303
we must solve for t2 Penny Nom lui répond. 





Solving an equation 
20040103 

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. 





Mr.Carter is very cautious 
20031126 

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. 





The substitution method 
20030414 

Patty pose la question :
I need help with the following: 5x  4y = 13 2y + 3x = 1 Penny Nom lui répond. 





Two investments 
20030207 

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 
20020726 

Derek pose la question : 1. 3x + 2y = 4 2. 7x + 2y = 24 finding x and y. Penny Nom lui répond. 





An augmented matrix 
20020420 

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 ab9c=5 Penny Nom lui répond. 





3/4n6=12 
20020407 

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 3/4n6=12 Penny Nom lui répond. 





Pairs of equations 
20020404 

A student pose la question :
high school level student is asking
y=4x x=4y
x+y=5 3x+2y=20
y=x1 3xy=4
x+y=3 2x3y=9
x+5y=4
3x+15y=1
. . .
Penny Nom lui répond. 





Algebra review questions 
20020114 

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. 





y = zx  x  c 
20011211 

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 
20011204 

Courtney pose la question : y = 3x + 2 y = 4x  5
solve for x Penny Nom lui répond. 





Slope intercept form 
20011127 

A student pose la question : what is slope intercept form? Penny Nom lui répond. 





3x1/2(x4)+5= 3 
20011113 

Tausa pose la question : 3x1/2(x4)+5= 3 Penny Nom lui répond. 





Where do the lines y=2x4 and y=x1 intesect? 
20010406 

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=2x4 and y=x1 intesect? Penny Nom lui répond. 





Linear equations 
20010213 

Jamie pose la question : I have a question how do you do linear equation? Penny Nom lui répond. 





Blood flow and age 
20010111 

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=(64100)/(3565)= 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. 





A piecewise linear equation 
20001124 

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. 





Connecting to a water line 
20001020 

Vanja pose la question : My question is...A house is to be connected to a new water main that runs along the line y=2/3x1. 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. 





Buying art supplies 
20000918 

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 
20000914 

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. 





Slope 
20000819 

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. 





The equation of a parabola 
20000522 

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 = ax^{2} + bx + c. Penny Nom lui répond. 





A matrix equation 
20000514 

A student pose la question : Right now, we are dealing with matrices and we are supposed to solve the following problem on our graphingcalculators: 2a+3b4c+d=20 a2b+3c5d=14 3a+4b2c+3d=19 5ab+6c+4d=5 Penny Nom lui répond. 





Taxis in Chicago 
20000327 

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 
20000320 

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. 





Systems of linear equations 
20000310 

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. 





Ax + By = C 
20000118 

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. 





Parallel lines 
20000112 

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. 





Systems of equations 
19991206 

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 
19991202 

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. 





Linear models 
19991109 

Helen Moreno pose la question : What is a linear model? Harley Weston lui répond. 





Why is slope designated m? 
19990818 

Peter Komlos pose la question : Why is the slope of a line is designated by the letter "m"? Penny Nom lui répond. 





Graphing a linear equation 
19990527 

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. 





Parallel and perpendicular lines 
19990423 

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 
19990422 

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. 





Linear Equations 
19990116 

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 
19981203 

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 
19981125 

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. 





A Linear System 
19981008 

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. 





Seed Problem 
19980326 

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. 





Yintercept 
19980227 

Don Trumpet pose la question : What is the Yintercept for the problem:Y = 2(x+2) + 9 Harley Weston lui répond. 





Intersecting Lines. 
19980210 

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. 

