







2xy = 2x*2y 
20201022 

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. 





Algebra 
20191106 

Krizhia pose la question : How is y= 1/2 * (x1)² be x= √2y + 1. Please show me the steps 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. 





Solve for x in Y=1.5x + log (1+x) 
20181223 

Asadollah pose la question : Please restate below expression in terms of y
Y=1.5x + log (1+x)
Thanks Penny Nom lui répond. 





Solve sinX=0.703X for X 
20180313 

PARAM pose la question : sinX=0.703X Penny Nom lui répond. 





(x18)/7=6 
20170808 

David pose la question : (x18)/7=6 Penny Nom lui répond. 





13  3x = x times the square root of 5 
20170329 

Kevin pose la question : A student I am tutoring was sent this question from his teacher.
Solve for x: 13  3x = x times the square root of 5 Penny Nom lui répond. 





2^x= 2x  11 
20161127 

Kathy pose la question : I don't know how to start this problem:
2^x= 2x  11 Penny Nom lui répond. 





An equation with fractions 
20161109 

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. 





A word problem 
20150917 

Suszanne pose la question : Multiplying a number by x yields the same result as dividing the number by 0.125. What is the value of x? Penny Nom lui répond. 





Manipulating an equation 
20140412 

Paul pose la question : S=4wl+2wh and solve for h Penny Nom lui répond. 





x^3+(1/x^3)=18√3 
20140223 

Asiv pose la question : if x^3+(1/x^3)=18√3; then what is the value of x? Penny Nom lui répond. 





When would one flip the inequality sign? 
20140109 

Natasha pose la question : Would one flip the inequality symbol in this equation: (explain why)
(9a)/(9) > 81
And please explain in what circumstances one would flip the inequality sign
THANKS! Penny Nom lui répond. 





Solve 0=2(x5)^2+4 
20131117 

Leila pose la question : How do you find the solution to 0=2(x5)^2+4 Penny Nom lui répond. 





2^x . 5^3 = x^4 
20130905 

Zuhdina pose la question : Hi, I got a question, 2^x . 5^3 = x^4
I want to know the value of x without using calculator, I've already done some questions in logarithm and I always stuck in the same model equationI think if someone shows me the way, I can do the other 'stuck equations' Penny Nom lui répond. 





Solve x = ln(x) 
20130719 

Udayan pose la question : Sir/Madam,
How to find the solutions of the equation,
x = ln(x) Penny Nom lui répond. 





4=(1+.08)^x 
20130615 

Samantha pose la question : I can't seem to understand how to solve for x when it is in power form, here is the equation:
4=(1+.08)^x Penny Nom lui répond. 





7x1/41/3[2x 1x/2]=19/3 
20130203 

M pose la question : 7x1/41/3[2x 1x/2]=19/3 Penny Nom lui répond. 





Sinx=logx+x^2 
20121128 

yasmin pose la question : Sinx=logx+x^2 Harley Weston lui répond. 





Solving for a/b 
20121021 

Jenny pose la question : If a + 3b is equal to 175% of 6b, what is the value of a/b? Penny Nom lui répond. 





Solve 8tr=12t for t 
20120929 

Monejah pose la question : I need help solving 8tr=12t for t Penny Nom lui répond. 





(2y+1)/3=(1y1)/2 
20120906 

jenna pose la question : (2y+1)/3=(1y1)/2 Penny Nom lui répond. 





2x+underroot2=3x43underroot2 
20120709 

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





Two equations involving fractions 
20120612 

Fatima pose la question : Hi ,teacher gave two question to my daughter as follows
Solve 2/x+3=(1/xx9)(1/x3)and
Solve (4/x2)(x/x+2)=16/xx4
Please help me
Thanks & regards fatima Penny Nom lui répond. 





Solve for x 
20120512 

Desiree pose la question : 3x 5^2=8 Penny Nom lui répond. 





8(3x+4)+6x=4(x8 )+4x 
20120118 

bianca pose la question : 8(3x+4)+6x=4(x8 )+4x Penny Nom lui répond. 





Solve for theta if 8cos^2 theta3=1 
20111202 

Katherine pose la question : Hi,
I have just learned to solve trigonometric problems for theta and have one specific question in order to find the solutions to my homework.
I will use one example for this question. If I have 8cos^2 theta3=1
I first divide by 8 and get cos^2theta=3/8
then I have cos theta= plus or minus the square root of 3/8
Then I assume that I plug in inverse cos (the square root of 3/8) to my calculator.
How do I find the four solutions (we are typically supposed to find four, I believe?)
Can you help me with finding the solution to this problem? Thank you! Penny Nom lui répond. 





A right angled triangle 
20110422 

jeremy pose la question : Solve the right triangle with the given sides and angles. a=3.0 cm and b=1.6 cm Penny Nom lui répond. 





6(M1/9)=55/12 
20110315 

Colleen pose la question : 6(M1/9)=55/12 Penny Nom lui répond. 





Rearrange for x 
20110206 

sue pose la question : (x+7)/3 = (3xy+2x)/4 rearrange for x Penny Nom lui répond. 





An algebra problem with fractions 
20101016 

Morgan pose la question : Hi my math teacher has given us this question for our grade nine math
class and I always get confused about multiple x algebra, could you help me?
6x+4 3x+2
 = 
3 5
I have no problems until it comes to combining integers, or x's Penny Nom lui répond. 





2x − 1 ( 1 − 2x) = 1 ( 2x − 2x) 
20101008 

MC pose la question : Solve 2x − 1 ( 1 − 2x) = 1 ( 2x − 2x) for x
I am befuddled! Thank you for any explanation you can give that show me the steps.
I know the order in which I should tackle it, but am so confused regarding how to
assume x. Thank you! 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. 





4x +3/4 = 1/4 
20091212 

Lynda pose la question : 4x +3/4 = 1/4
I know the answer is 1/8 but I don't know how to show the process of getting the answer Penny Nom lui répond. 





at+b=arc, solve for a 
20090916 

kimberly pose la question : at+b=arc, solve for a 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. 





Sequence problem 
20090818 

James pose la question : I have the equation: t_{n} = (n)(n+1)/2
Which gives the sequence: 1, 3, 6, 10, 15 etc.
However, I'd like to be able to solve for n.
So that a t of 6 would give me the answer of 3, and t of 10 would give me the answer 4 etc. Stephen La Rocque and Victoria West lui répond. 





Solve for s 
20090812 

Michelle pose la question : My daughter and I are having trouble with this problem...All it says i solve thr formula for the indicated variable.
Height of an Equilateral Triangle.
Solve for s:
H= square root of 3/2 * S Penny Nom lui répond. 





Solve 18(C3)=162 for C 
20090529 

Alicia pose la question : 18(C3)=162
adult student returning to school after 20 years and
then never had it in school. Just doesn't click yet Penny Nom lui répond. 





Negative nine minus 7x = negative 5 
20090423 

gigi pose la question : what is negative nine minus 7x = negative 5 Robert Dawson lui répond. 





Make x the subject in this equation 
20090416 

victoria pose la question : hi,
i need help trying to make x the subject in this equation:
7y + 2x = 15
i'm really stuck so any help will be good,
thanks Penny Nom lui répond. 





A five game average of 148 
20090401 

Shelly pose la question : (128 + 145 + 139 + 157 + x) divided by 5 = 148 matches the situation stated below:
A person bowled four games and scored 128, 145, 139, and 157. Find x, the score the person would need to have in the fifth game to average 148 for all five games.
How do I solve this and how am I supposed to add x like it says in the equation? Penny Nom lui répond. 





x^2/5  4/5 = 3/5x 
20090325 

Lorrie pose la question : x^2/5  4/5 = 3/5x Penny Nom lui répond. 





Solving an equation for b 
20090313 

ernest pose la question : If 2b=96+b+96+1/2b solve for b? Penny Nom lui répond. 





Solve for x 
20090116 

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





Solving an equation for D 
20081218 

Darrin pose la question : In his finance class, my son is being asked to take the following equation and solve for "D":
1 / [1  (1 + D/12)^T] = (1 / D) * [((12*B) / (P*T)) + Y + ((12N * Z) / (360T))]  [(12Z) / (360T)] * F Robert Dawson lui répond. 





Solve for x 
20081216 

Melissa pose la question : I have a test tomorrow and I'm hoping you can help me before then. I can never seem to solve the "RESOLVE X" problems, or in french resous pour x/
They look like this. 3x+2\6=2x5\3. I only understand NOTHING from that.
Another equation is 2(x+1)=3(x+2). Robert Dawson and 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. 





Solve the equation 2x + y = 6 for y. 
20081107 

fatiuma pose la question : Solve the equation 2x + y = 6 for y. Penny Nom lui répond. 





Equations with the variable in the exponent 
20081028 

fari pose la question : Solve for x
5 * 4^x3=40
5^x=25^(x+8) 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. 





(5x  4) / 6 = 9 
20080909 

Conor pose la question : Solve to find x:
(5x  4) / 6 = 9 Penny Nom lui répond. 





1/3(2x1)=1 
20080907 

Jen pose la question : 1/3(2x1)=1 Penny Nom lui répond. 





v4(4v) = 2(2v1) 
20080829 

c pose la question : Please explain all the steps to solving this
v4(4v) = 2(2v1) Penny Nom lui répond. 





Solve for y in terms of x 
20080810 

Rosie pose la question : Solve equation for y
4x=12+3y Penny Nom lui répond. 





Solving for Two Variables 
20080724 

Mary pose la question : can you help,
2/35= 1/x +1/y ; x Janice Cotcher, Victoria West and Harley Weston lui répond. 





x=(14x+16)/x8 
20080611 

Kory pose la question : Solve the equation.
x=(14x+16)/x8 Penny Nom 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. 





(322 x 5) divided by 2 + 8 
20071128 

Kim pose la question : Solve
(322 x 5) divided by 2 + 8 Leeanne Boehm lui répond. 





How to solve related rates problems 
20071027 

David pose la question : Can you plz explain how and where you come up with an equation to solve this?
Find the rate of change of the distance between the origin and a moving point on the graph of y = sin x if dx/dt = 2 centimeters per second. Stephen La Rocque lui répond. 





sin 43= y/20 
20071021 

stefany pose la question : if sin 43= y/20, what is the value of y to the nearest tenth? Penny Nom lui répond. 





5x + 9 = 3x + 7 
20071016 

kristina pose la question : hi im kristina and i cannot figure out how 2 do these multistep 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 
20071015 

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. 





Solving four simultaneous equations (system of four linear equations) 
20071007 

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. 





Solve for K 
20071005 

Ben pose la question : Solve the formula for K
C=30d+0.10k Stephen La Rocque lui répond. 





1/2+X=5/8 
20070924 

Tasha pose la question : What is the sum of X in the problem below and explain your answer please?
1/2+X=5/8 Chris Langdon lui répond. 





13 = x/20 
20070906 

Melissa pose la question : can u please help me with this question?
13 = x/20 Penny Nom lui répond. 





z+81 = 9z7 
20070824 

Erin pose la question : Question from erin, a student:
z+81=9z7 Stephen la Rocque lui répond. 





More on a percentage question 
20070823 

Dee pose la question : In a previous question, you answered:
"What percentage of $34.51 is $10.71?
I translate this English statement into a mathematical statement (equation) using the following
"what" is the unknown, call it x
"percent" is peronehundred, that is over 100
"of" is multiplication
"is" is the verb, which in an equation is the equal sign
Thus the English statement above becomes
x/100 $34.51 = $10.71
Solving for x yields
x = 31.03
Hence the gross profit is 31% of your selling price."
How did you solve for 'x' Penny Nom lui répond. 





(2x + 3y)^2 = 0 
20070621 

Jon pose la question : how do i solve for x and y if (2x+3y)²=0? Stephen La Rocque lui répond. 





Algebra : 9x + 7 = 5x  3 
20070615 

Allen pose la question : I am having a problem solving for x. The problem is:
9x + 7 = 5x  3 Stephen La Rocque lui répond. 





Algebra  find the number 
20070604 

Fabiola pose la question : When 4 times a number is increased by 40, the answer is the same as
when100 is decreased by a number. Find the number Stephen La Rocque lui répond. 





Solve for I 
20070523 

Mark pose la question : A=4.9(B)*C^(.00925(D.542))* E^(.015(D))*E^(.013(F))* (G/B)^(.00825(D.225))* H^.877*(I/B)^.511*(J/B)^.319 Stephen La Rocque lui répond. 





Algebra (Solve for B) 
20070523 

Mark pose la question : A = .250 * (B^2*SIN(C)) / (D*COS^2(E)). I need to solve for B. Stephen La Rocque lui répond. 





Base seven 
20070519 

Dan pose la question : A number X is converted to base 7 and becomes a four digit number. Its leftmost digit is removed and written again as the rightmost digit. The number thus obtained is twice X. Find the decimal representations of all such numbers X. Penny Nom lui répond. 





Find the real solutions in this trig equation 
20070509 

tony pose la question : list all real solutions of the equation that are in the interval [0,2π)
2cos(x) + tan(x) = sec(x) Penny Nom and Stephen La Rocque lui répond. 





What is 2x + 1? 
20070430 

Cynthia pose la question : Hi,
How do I solve this problem?
If 1/3x + 7= 16, what is the value of 2x+1
Thanks,
Cynthia Stephen La Rocque lui répond. 





.07 = (1 + x)/(1+.12)  1 
20070417 

Kathy pose la question : How would you solve
.07 = (1 + x)/(1+.12)  1 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. 





Solve for c 
20070226 

Steffane pose la question : A over m = b over c sorry I can't put them over each other Penny Nom lui répond. 





Algebra 
20070213 

B.Wilson pose la question : The teacher has asked to solve the following, but I have never seen this before: 6x/2 = 4x/5 Haley Ess lui répond. 





11^n +22^n = 55^n 
20070129 

Ankit pose la question : 11^n +22^n = 55^n
find the value of n? Penny Nom lui répond. 





(3x+5) / 2 = (5x+3) / (3)+ 2 
20070122 

Jaclyn pose la question : (3x+5) / 2 = (5x+3) / (3)+ 2 Penny Nom lui répond. 





x divided by 8+2= 3x divided by 43. 
20070118 

Fabiola pose la question : x divided by 8+2= 3x divided by 43. need to solve for x Penny Nom lui répond. 





solve; 
20061128 

Monique pose la question : solve; f(f(x)) = 2x + 4 ; if f(x) = 1 Penny Nom lui répond. 





(x  5)/3  3/2 = (4x + 7)/6 
20061123 

Terri pose la question : I have never had algebra before and I am finding it difficult.Can you please help me work this problem out?
(x  5)/3  3/2 = (4x + 7)/6 Penny Nom lui répond. 





4/7x+3=15 
20061104 

Ashley pose la question : Solve 4/7x+3=15 Penny Nom lui répond. 





Balancing equations 
20061026 

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. 





How do you solve for variables in the denominator? 
20061015 

Donna pose la question : How do you solve for variables in the denominator?
178 = 17/R Stephen La Rocque lui répond. 





Solving a linear equation 
20061012 

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





30+7(x1)=3(2x+7) 
20060929 

Art pose la question : 30+7(x1)=3(2x+7)
I know with the distributive law I multiply 7 by x and 7 by 1 and the same thing to the right, only 3 by 2 and 7 than I am lost? Penny Nom lui répond. 





X^1/3X^1/9=60 
20060926 

Harini pose la question : I need the answer for
The value of X in X^1/3X^1/9=60. Penny Nom lui répond. 





If 5x + 4y = 6 then x + y = ? 
20060818 

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 
20060801 

Lynne pose la question : x+ 6 / 3 = x+ 6 / x
How do I solve this equation? Penny Nom lui répond. 





[(400/n)5](n+ 4)=400 
20060702 

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. 





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

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





3z5+2z=255z 
20051002 

Davis pose la question : 3z5+2z=255z Penny Nom lui répond. 





U'(X)  U(X) = 0; U(0) = 2 
20050923 

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. 





How do you solve 3x^2 + x  2 = 0 
20050915 

Lizzy pose la question : How do you solve 3x2 + x  2 = 0 Penny Nom lui répond. 





y = log(x) + x. Solve for x. 
20050826 

Alain pose la question :
I have the following equation:
y = ln(x) + x
How do I solve for x?
Penny Nom lui répond. 





3A/4 +1=(2A1)/3 
20050821 

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=(2A1)/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 
20050720 

Ed pose la question : ^{(x1)}/_{3}  1 = ^{(x + 2)}/_{2} Penny lui répond. 





y = x+2 and y = 2x  1 
20050503 

Kimberley pose la question : Question:
y=x+2
y=2x1 Penny Nom lui répond. 





Solve for x 
20050202 

Christie pose la question : Solve for x
.387 = (.40  .265x)/(sqrt(1x2)) Penny Nom lui répond. 





1/x + 1/y = 2/31 
20041201 

matt pose la question : I have this problem which I think is a bit more tricky than usual.
x and y are positive integers.
1/x + 1/y = 2/31 Claude Tardif lui répond. 





e = ln(b/a) solve for a 
20041201 

Daniel pose la question : I am trying to make "a" the subject of this equation "e = ln(b/a)" but am not sure if i'm doing it right. Any help would be appriciated, Claude Tardif lui répond. 





Solve for a and t 
20041023 

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. 





Solve for z 
20040830 

Ana pose la question : Solve for z when 4x + 10yz = 0
solve for z if y2 + 3yz  8z  4x = 0?
Do I have to solve all of the variables in order to get z? Penny Nom lui répond. 





x^2 = x + 2 
20040726 

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 
20040715 

A student pose la question : Could you please solve the following for x
x^{2}+6=5x
x^{2}+16=8x
2x+21=3x^{2} Penny Nom lui répond. 





12(1.221)^t = t + 3 
20040714 

Jay pose la question : This problem has me stumped since i cannot separate the t and the 3. Here it is:
12(1.221)^{t} = t + 3
It's on a logarithm worksheet, but how do i figure it out?! Harley Weston lui répond. 





x = 2^x 
20040712 

A student pose la question : If the graphs of y=x and y=2^{x} are drawn on the same set of axes, they will intersect when x is equal to what?
(1)1
(2)2
(3)0
(4)They won't intersect.
I know the answer is number 4 by graphing which is permitted; however, I would like to know if there is any algebraic way to do this type of problem.If yes, please show me how.Thanks. 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. 





x^2/3  7 x^1/3 + 12 = 0 
20040405 

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 intersection of two graphs 
20040331 

Benjanim pose la question : How do I find the points of intersection of the two functions:
1) y = 2  (e^x)
2) y = 1 + (x^2)
I know that I have to set them equal to each other, but I can't solve for x. Please help :) Penny Nom lui répond. 





z^2 = 3  4i 
20040326 

John pose la question : Solve: Z^2 = 3  4i Harley Weston 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. 





Diamonds and Pearls 
20031211 

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. 





4(r2) = r(2+8) 
20031120 

Angela pose la question : I not going to give you the problem that I have, but a problem like it.
4(r2) = 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. 





Solve for Q 
20031103 

Anwaar pose la question :
The problem is: QT  X ________ + H = HT QS Peny Nom lui répond. 





Solve for x 
20031027 

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. 





Substitution method 
20030914 

John pose la question :
Hello, my name is john and while I was finishing up my work I stumbled into these problems. a/4b=1 a+b=11 and 6ab=5 4a3b=8 Thanks a lot. I really need some help :) John Penny Nom lui répond. 





Two equations 
20030821 

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:
3^{2a+1}  283^{a} + 9=0 and 5^{2m}  5^{m}=20 Penny Nom lui répond. 





x+3 = 15x 
20030719 

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 xvalue was 3 or less, or if it was more than 3)? Claude Tardif and Penny Nom lui répond. 





Solve x = y^z for z 
20030628 

Nathan pose la question : If x = y^z is there a way to solve for z, if x and y are given, without guessing or already knowing the answer?
ie: 64 = 2^z 6 is the obvious value for z. Is there a way I could solve for this variable using a formula, which would also apply when more complex values were substituted for x and y? Penny Nom lui répond. 





R= 5.3lnx + x. 
20030511 

A student pose la question : Reaction R to a dose x is given by: R= 5.3lnx + x. For a certain drug, R must not exceed 21. Show that a dose between 8 and 12 units satisfies this requirement & find, correct to 5 decimal places, the greates value of x which satisfies this condition? Harley Weston lui répond. 





12*nC2 = n! 
20030330 

A tutor pose la question : Solve for "N"
12*nC2=N! Walter Whiteley lui répond. 





(n+17)(n+7) = 0 
20030305 

Janea pose la question :
What is the answer to 1. (n+17)(n+7)=0 What is the answer to:2. (y15)(y100)=0 Penny Nom lui répond. 





Two equations in two unknowns 
20030206 

Patrick pose la question : What are all ordered pairs of real numbers (x, y) for which: y^{x2  7x + 12} = 1 and x + y = 6? Penny Nom lui répond. 





The intersection of conics 
20021219 

Glenda pose la question : We are studying systems of equations where two conic sections are the two equations that we are solving simultaneously. We were studying the number of solutions that are possible if you have an ellipse and a parabola. We all agree that there can be none, one, two, three or four solutions. The question that the students had for me was whether or not a portion of an ellipse and a parabola can overlap and thereby allow an infinite number of solutions. What should I tell them? Chris Fisher and Harley Weston lui répond. 





Find a, b and c 
20021210 

Sameer pose la question : Question:
a+b+c=180 b=a+(120/25) c=b(13010)/6 a=? b=? c=? Penny Nom lui répond. 





Quadratic equations 
20021210 

Katie pose la question : just bugging the hell outta me and I cannot figure it out for the life of me.
1)x2x1 =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. 





Algebra 
20021113 

Carol pose la question : I am a confused parent trying to help my dau hgter solve some math problems and I need help. 3[x4]=27 Penny Nom lui répond. 





x intercepts 
20021110 

Laura pose la question : Find the x intercepts for the graph of the equation. x^{ 2}  x  12 = 0 Penny Nom lui répond. 





(93+n)+158=93+(28+158) 
20021110 

Parents pose la question : (93+n)+158=93+(28+158) Penny Nom lui répond. 





G = 3H  5 
20021107 

Kash pose la question : G=3H5, for H solve for the given variable Penny Nom lui répond. 





Determining a parabola 
20021106 

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? 
20021020 

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. 





Solving an equation 
20020922 

Emanuel pose la question : how do u solve these problems?:
30/x=7+ 18/2x
3m+1/4 = 2 32m/3 Penny Nom lui répond. 





Express 5120 as a sum of consecutive numbers 
20020825 

Todd pose la question : Express 5120 as a sum of more than 1 consecutive number. Leeanne Boehm 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. 





Some inequalities 
20020725 

A student pose la question :
1)5 <= 3X+1 < 1 2)4X2 < 6 OR X+2 > 9 Penny Nom lui répond. 





25m = 100 
20020422 

Megan pose la question : If 25m = 100, Then m equals what number? Penny Nom lui répond. 





Solve for x 
20020420 

A student pose la question : solve for x. cx 2x+b  =  a c Peny 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. 





Solving for x 
20020419 

Susan pose la question : I'm having a little trouble solving these equations for x. I can't seem to separate x fully from the other numbers. Please help! Here are the problems: (2x1)/(x2)(x^{ 2}+3) = 0 and y/(x+1)=z/x Penny Nom lui répond. 





Two algebra problems 
20020414 

Ashley pose la question : Question 1: For all values of a, let < a > be defined as < a > = 4a  4 . Which of the following equals < 6 >  < 5 >? A: < 2 > B: < 3 > C: < 4 > D: < 5 > E: < 6 > Question 2: If 5n + p = 3 and 2m  10n = 2, what is the value of m + p? 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. 





Two algebra problems 
20011224 

Cass pose la question : if the graph of a equation is 2x^{2}  y^{2} = 8 passes through point (6,k), find the positive value of k. if 5^{x2  2 x} = 1, find positive value of x 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. 





y= (3x+2)/(4x5) 
20011205 

Courtney pose la question : y= (3x+2)/(4x5) solve for x 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. 





Solving x^23x+5=0 
20011130 

Katy pose la question : How do you find the solution to x^{2}3x+5=0? Penny Nom lui répond. 





Matrix 
20011121 

Hoda pose la question : I have a question about matrix multiplication; well, actually, matrix division. I am assuming that matrices are divided the same as they are multiplied; that is, row by column. But what happens if you have to divide by zero? How does this affect the resulting matrix? Patrick Maidorn and Penny Nom lui répond. 





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

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





A cubic 
20011110 

Louise pose la question : x^{3} + 9x^{2}  7x  63 Penny Nom lui répond. 





1 minus 5(y) equals negative 2 
20011110 

Judy pose la question : 1 minus 5(y) equals negative 2 Penny Nom lui répond. 





8w15 = 3w10 
20011101 

A student pose la question : 8w15=3w10, w =????? Paul Betts lui répond. 





Solving trig equations 
20010922 

Asad pose la question : Can you please explain to me how to solve trig Equations,e.g sin(x)=x^{4}+12/2+cos(x)=x^{6}+9/3= (if this can be solved) Claude Tardif lui répond. 





Solve for h 
20010917 

Kim pose la question : s=2lw+2wh+2hl solve for h Penny Nom lui répond. 





Common solution 
20010602 

Samantha pose la question :
 Solve for common solution: x+y=6 2x3y=2
 Solve for y in terms of x: 3xy=4
Penny Nom lui répond. 





Solving some equations 
20010416 

Justin pose la question : Solve the following equations for x  x+7=10
x=
 x7=10
x=
 3x=7
x=
 x/3=10
x=
 .
 .
 .
 .
Penny Nom lui répond. 





(8 + 5)5 = (y + 4)4 
20010401 

Kelley pose la question : (8 + 5)5 = (y + 4)4 What is the value of y? Penny Nom lui répond. 





Solving an equation 
20010327 

Jennifer pose la question : How would I solve this equation? 1.6 = 2x/(.1x)  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. 





Quadratic equations 
20010311 

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 
20010305 

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? 
20010303 

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 
20010228 

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. 





Solve for two variables 
20010225 

A student pose la question : How do I solve for %1 and %2 in the following formula when T1, T2 and T3 are known? %1 and %2 are ratios of the same element, therefore %1 + %2 = 100%
(%1 x T1) + (%2 x T2) = T3 Penny Nom lui répond. 





g(g+5)=0 
20010220 

Jenna pose la question : g(g + 5) = 0 Penny Nom lui répond. 





A problem with distance 
20010116 

A student pose la question : For what values of a is the distance between P(a, 3) and Q(5, 2a) greater than the square root of 26. Penny Nom lui répond. 





Completing the square 
20010112 

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? 8x^{2} + 8x + 4 Penny Nom lui répond. 





Solving x  sin(x) = constant 
20001229 

Keith Roble pose la question : If x is in radians, how do you solve for x, where: xsin(x) = constant? Harley Weston lui répond. 





Solving an equation 
20001229 

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. 





Solving an equation 
20001114 

Heather pose la question : 4x3 = 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. 





2step equations 
20001011 

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. 





A equation with a square root 
20000903 

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 
20000826 

Patrick pose la question : My question is how would u do a problem like this.......... [2x37] =15?....u have to solve it for absolute value equations....???? Harley Weston lui répond. 





Two linear systems 
20000801 

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. 





LOG(LN(x)) = 1 
20000728 

An algebra student pose la question : LET F(x)=LOG X AND G(x)= LN X. SOLVE (f *G)(x)= 1 SHOW COMPOSITION AND USE DEFINITION OF LOGS. Harley Weston lui répond. 





(mn + m + n)/(m^2 + n^2) = 1 
20000724 

William pose la question : Find all pair of positive integers m and n such that mn + m + n divides m^{2} + n^{2} = 1. Peny Nom lui répond. 





An equation involving x to the x 
20000722 

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 x^{x} (1 + log x) = 0, by which we can conclude that x^{x} = 0 or 1 + log x = 0. If x^{x} = 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(n2)! 
20000721 

Damon Bailey pose la question : Solve n! = 42(n2)! Paul Betts lui répond. 





4x  [2x (3x  2)] = 13 
20000513 

Teresa pose la question : I need to find the following equation. 4x  [2x (3x  2)] = 13 Penny Nom 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. 





Some equations 
20000308 

Maria pose la question : Hi, could you help me with these questions: Find x & solve  72x/3=9
 4x+3/5=2
 62x=14
 1/7x=4/3+1/6
Penny Nom lui répond. 





Solving an equation 
20000117 

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. 





Capacitor discharge rate 
20000109 

Bill Phillips pose la question : I need to be solve for t in the following rate problem for an electrical capacitor. Vr = E(e^t/RC), e=nat. log 2.718 raised to the t/RC power. Harley Weston lui répond. 





Solving a cubic equation 
19991230 

Natalia pose la question : How can I solve: 2 x^{3}  x^{2} + x  2 = 0 ??? Penny Nom lui répond. 





Solve for v 
19991209 

Beth pose la question : 13/4(v+2)=5 Penny Nom lui répond. 





Inequalities and absolute values 
19991207 

Austin Cline pose la question : Solve for x: The absolute value of x1 is less than or equal to the absolute value of x2 Harley Weston lui répond. 





Multiple step problems 
19991109 

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=m6. Penny Nom lui répond. 





Equations with fractions 
19991010 

Lori pose la question : I'm a secondary student. How would you figure out a problem such as t2/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. 





Two Quadratics 
19991008 

Jason On pose la question : Solve the following equations,expressing solutions in the form p + iq.  sqr(x) + 2x  1 = 0,
 sqr(x) + 2x  3 = 0.
Harley Weston lui répond. 





sin x = x/10 
19991007 

Amandeep Grover pose la question : Solve the equation sin x = x/10 Harley Weston lui répond. 





8*(5a)=15 
19990922 

Shelby pose la question : 8*(5a)=15 i cannot get this question!! please help me!! Harley Weston lui répond. 





Grade 10 math 
19990408 

Ron pose la question : the type of question i'm having trouble with is 5(2x1)=3(x4) Penny Nom lui répond. 





Quadratic equations 
19990331 

Ken Niebergall pose la question : #1 a^{2}  10a = 2a  36 #2 t(t  5) = 5 (t  5) #3. (x + 4)(x  3) = 8 Thanks. Jack LeSage and Penny Nom lui répond. 





The Quadratic Formula 
19990122 

Eric Morgan pose la question : Hi my name is Eric Morgan and I m in 8th Grade honors math (middle) and I'd like to know how to prove the quadratic formula b±sqrt of b(a)(c)over 2(a) 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. 





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. 





Solving Quadratics 
19980716 

Fred Goodrich pose la question : I need a step by step lesson on solving quadratic equations. Thank you, Penny Nom lui répond. 





Grade 9 Algebra 
19980607 

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(y1/2)=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. 





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. 





Find the Numbers. 
19971228 

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. 





Solving a Trig Equation. 
19970428 

Susan Harvey pose la question : Hi I am a teacher and have a calculus problem that I have a solution to but it seems so involved that I would be interested to see if their were other solutions. Solve for x, if x is from 90 to 90 degrees tan2x = 8cos{squared}x  cotx Chris Fisher Denis Hanson and Harley Weston lui répond. 





Natural Logarithm Functions 
19970423 

Rickson pose la question : The following two questions are some of my son's homework that he is having trouble with......any advice or assistance would be appreciated. (eX)5=1000.............the X and 5 are exponents lnx + ln(x+3) = ln10 In each question the problem is to find x. Harley Weston lui répond. 





Will this always yield a palindrome? 
19960828 

Andy Golden pose la question : My friend Justin Skywatcher, said that when his children were in 6th grade, they were taught that if you take any number, reverse it and add the two together, a palindrome will result. If not, continue performing the above operations, and a palindrome will eventually result. Will this always yield a palindrome? Chris Fisher lui répond. 

