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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.
Algebra 2019-11-06
Krizhia pose la question :
How is y= 1/2 * (x-1)˛ be x= √2y + 1. Please show me the steps
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.
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.
Solve sinX=0.703X for X 2018-03-13
PARAM pose la question :
sinX=0.703X
Penny Nom lui répond.
(x-18)/7=6 2017-08-08
David pose la question :
(x-18)/7=6
Penny Nom lui répond.
13 - 3x = x times the square root of 5 2017-03-29
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 2016-11-27
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 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.
A word problem 2015-09-17
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 2014-04-12
Paul pose la question :
S=4wl+2wh and solve for h
Penny Nom lui répond.
x^3+(1/x^3)=18√3 2014-02-23
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? 2014-01-09
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(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.
2^x . 5^3 = x^4 2013-09-05
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 equation-I think if someone shows me the way, I can do the other 'stuck equations'
Penny Nom lui répond.
Solve x = ln(x) 2013-07-19
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 2013-06-15
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.
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.
Sinx=logx+x^2 2012-11-28
yasmin pose la question :
Sinx=logx+x^2
Harley Weston lui répond.
Solving for a/b 2012-10-21
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 8t-r=12t for t 2012-09-29
Monejah pose la question :
I need help solving 8t-r=12t for t
Penny Nom lui répond.
(2y+1)/3=(1y-1)/2 2012-09-06
jenna pose la question :
(2y+1)/3=(1y-1)/2
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.
Two equations involving fractions 2012-06-12
Fatima pose la question :
Hi ,teacher gave two question to my daughter as follows
Solve 2/x+3=(1/xx-9)-(1/x-3)and
Solve (4/x-2)-(x/x+2)=16/xx-4


Please help me
Thanks & regards fatima

Penny Nom lui répond.
Solve for x 2012-05-12
Desiree pose la question :
3x -5^2=8
Penny Nom 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.
Solve for theta if 8cos^2 theta-3=1 2011-12-02
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 theta-3=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 2011-04-22
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(M-1/9)=55/12 2011-03-15
Colleen pose la question :
6(M-1/9)=55/12
Penny Nom lui répond.
Rearrange for x 2011-02-06
sue pose la question :
(x+7)/3 = (3xy+2x)/4 rearrange for x
Penny Nom lui répond.
An algebra problem with fractions 2010-10-16
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) 2010-10-08
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 2010-01-16
dog pose la question :
4x-9=7x+12
Penny Nom lui répond.
4x +3/4 = 1/4 2009-12-12
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=ar-c, solve for a 2009-09-16
kimberly pose la question :
at+b=ar-c, solve for a
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.
Sequence problem 2009-08-18
James pose la question :
I have the equation: tn = (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 2009-08-12
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(C-3)=162 for C 2009-05-29
Alicia pose la question :
18(C-3)=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 2009-04-23
gigi pose la question :
what is negative nine minus 7x = negative 5
Robert Dawson lui répond.
Make x the subject in this equation 2009-04-16
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 2009-04-01
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 2009-03-25
Lorrie pose la question :
x^2/5 - 4/5 = -3/5x
Penny Nom 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.
Solve for x 2009-01-16
maritza pose la question :
5=3(x-2)=
Penny Nom lui répond.
Solving an equation for D 2008-12-18
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 2008-12-16
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=2x-5\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= 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.
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.
Equations with the variable in the exponent 2008-10-28
fari pose la question :
Solve for x

5 * 4^x-3=40
5^x=25^(x+8)

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.
(5x - 4) / 6 = -9 2008-09-09
Conor pose la question :
Solve to find x:

(5x - 4) / 6 = -9

Penny Nom lui répond.
1/3(2x-1)=1 2008-09-07
Jen pose la question :
1/3(2x-1)=1
Penny Nom lui répond.
v-4(4-v) = -2(2v-1) 2008-08-29
c pose la question :
Please explain all the steps to solving this

v-4(4-v) = -2(2v-1)

Penny Nom lui répond.
Solve for y in terms of x 2008-08-10
Rosie pose la question :
Solve equation for y

-4x=12+3y

Penny Nom lui répond.
Solving for Two Variables 2008-07-24
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)/x-8 2008-06-11
Kory pose la question :
Solve the equation.
x=(-14x+16)/x-8

Penny Nom 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.
(32-2 x 5) divided by 2 + 8 2007-11-28
Kim pose la question :
Solve

(32-2 x 5) divided by 2 + 8

Leeanne Boehm lui répond.
How to solve related rates problems 2007-10-27
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 2007-10-21
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 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.
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.
Solve for K 2007-10-05
Ben pose la question :
Solve the formula for K C=30d+0.10k
Stephen La Rocque lui répond.
1/2+X=5/8 2007-09-24
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 2007-09-06
Melissa pose la question :
can u please help me with this question?
13 = x/20

Penny Nom lui répond.
z+81 = 9z-7 2007-08-24
Erin pose la question :
Question from erin, a student:

z+81=9z-7

Stephen la Rocque lui répond.
More on a percentage question 2007-08-23
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 per-one-hundred, 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 2007-06-21
Jon pose la question :
how do i solve for x and y if (2x+3y)˛=0?
Stephen La Rocque lui répond.
Algebra : 9x + 7 = 5x - 3 2007-06-15
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 2007-06-04
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 2007-05-23
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) 2007-05-23
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 2007-05-19
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 2007-05-09
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? 2007-04-30
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 2007-04-17
Kathy pose la question :
How would you solve

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

Stephen La Rocque 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.
Solve for c 2007-02-26
Steffane pose la question :
A over m = b over c sorry I can't put them over each other
Penny Nom lui répond.
Algebra 2007-02-13
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 2007-01-29
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 2007-01-22
Jaclyn pose la question :
(3x+5) / 2 = (5x+3) / (3)+ 2
Penny Nom lui répond.
x divided by 8+2= 3x divided by 4-3. 2007-01-18
Fabiola pose la question :
x divided by 8+2= 3x divided by 4-3.
need to solve for x

Penny Nom lui répond.
solve; 2006-11-28
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 2006-11-23
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 2006-11-04
Ashley pose la question :
Solve 4/7x+3=15
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.
How do you solve for variables in the denominator? 2006-10-15
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 2006-10-12
Eriona pose la question :
6p-5=17. I have to solve the equation.
Penny Nom lui répond.
30+7(x-1)=3(2x+7) 2006-09-29
Art pose la question :
30+7(x-1)=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^1/3-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.

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.
[(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.
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.
3z-5+2z=25-5z 2005-10-02
Davis pose la question :
3z-5+2z=25-5z
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.
How do you solve 3x^2 + x - 2 = 0 2005-09-15
Lizzy pose la question :
How do you solve 3x2 + x - 2 = 0
Penny Nom lui répond.
y = log(x) + x. Solve for x. 2005-08-26
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=(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.
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.
Solve for x 2005-02-02
Christie pose la question :
Solve for x

.387 = (.40 - .265x)/(sqrt(1-x2))

Penny Nom lui répond.
1/x + 1/y = 2/31 2004-12-01
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 2004-12-01
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 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.
Solve for z 2004-08-30
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 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.
12(1.221)^t = t + 3 2004-07-14
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 2004-07-12
A student pose la question :
If the graphs of y=x and y=2x 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 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.
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 intersection of two graphs 2004-03-31
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 2004-03-26
John pose la question :
Solve: Z^2 = 3 - 4i
Harley Weston 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.
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.
Solve for Q 2003-11-03
Anwaar pose la question :

The problem is:

QT - X
________ + H = HT
QS


Peny 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.
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.
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.
Solve x = y^z for z 2003-06-28
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. 2003-05-11
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! 2003-03-30
A tutor pose la question :
Solve for "N"

12*nC2=N!

Walter Whiteley 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.
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.
The intersection of conics 2002-12-19
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 2002-12-10
Sameer pose la question :
Question:

a+b+c=180
b=a+(120/2-5)
c=b-(130-10)/6
a=?
b=?
c=?

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.
Algebra 2002-11-13
Carol pose la question :
I am a confused parent trying to help my dau hgter solve some math problems and I need help.

3[x-4]=27


Penny Nom lui répond.
x intercepts 2002-11-10
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) 2002-11-10
Parents pose la question :
(93+n)+158=93+(28+158)
Penny Nom lui répond.
G = 3H - 5 2002-11-07
Kash pose la question :
G=3H-5, for H solve for the given variable
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.
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.
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.
Some inequalities 2002-07-25
A student pose la question :

1)-5 <= -3X+1 < 1

2)4X-2 < 6 OR X+2 > 9


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.
Solving for x 2002-04-19
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:

(2x-1)/(x-2)(x 2+3) = 0 and

y/(x+1)=z/x
Penny Nom lui répond.

Two algebra problems 2002-04-14
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.
3/4n-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.
Algebra review questions 2002-01-14
A student pose la question :
  1. A wildebeast was observed racing a distance of 86.4m in 4.8 seconds. Find the speed of the wildebeast in m/s.

  2. 8x - 7 - 5x = 23

  3. 7 z - 3 (z + 2) = 26

Penny Nom lui répond.
Two algebra problems 2001-12-24
Cass pose la question :
if the graph of a equation is 2x2 - y2 = 8 passes through point (6,k), find the positive value of k.

if 5x2 - 2 x = 1, find positive value of x


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.
y= (3x+2)/(4x-5) 2001-12-05
Courtney pose la question :
y= (3x+2)/(4x-5)
solve for x

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.
Solving x^2-3x+5=0 2001-11-30
Katy pose la question :
How do you find the solution to x2-3x+5=0?
Penny Nom lui répond.
Matrix 2001-11-21
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.
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.
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.
Solve for h 2001-09-17
Kim pose la question :
s=2lw+2wh+2hl solve for h
Penny Nom lui répond.
Common solution 2001-06-02
Samantha pose la question :
  1. Solve for common solution: x+y=6 2x-3y=2

  2. Solve for y in terms of x: 3x-y=4

Penny Nom lui répond.
Solving some equations 2001-04-16
Justin pose la question :
Solve the following equations for x
  1. x+7=10
    x=

  2. x-7=10
    x=

  3. 3x=7
    x=

  4. x/3=10
    x=

  5. .

  6. .

  7. .

  8. .

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.
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.
  1. y = 8
    7x = 1 - y

  2. 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.
  1. 21 = 9 - 2 (4a + 2) and I am supposed to find out what the variable is.

  2. 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 2001-02-25
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 2001-02-20
Jenna pose la question :
g(g + 5) = 0
Penny Nom lui répond.
A problem with distance 2001-01-16
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 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.
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.
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.
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.
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.
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.
LOG(LN(x)) = 1 2000-07-28
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 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.
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.
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.
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.
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.
Capacitor discharge rate 2000-01-09
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 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.
Inequalities and absolute values 1999-12-07
Austin Cline pose la question :
Solve for x: The absolute value of x-1 is less than or equal to the absolute value of x-2
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.
Two Quadratics 1999-10-08
Jason On pose la question :
Solve the following equations,expressing solutions in the form p + iq.
  1. sqr(x) + 2x - 1 = 0,
  2. sqr(x) + 2x - 3 = 0.

Harley Weston 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.

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.

The Quadratic Formula 1999-01-22
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 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.

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.
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.

Solving Quadratics 1998-07-16
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 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.

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.
Solving a Trig Equation. 1997-04-28
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 1997-04-23
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? 1996-08-28
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.
 
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