Sunday

April 20, 2014

April 20, 2014

Number of results: 15,658

**Math**

You handle it like an alg problem. subtract 2x from each side. 3y>-2x divide by 3 y>-2/3 x that is it. Only one thing you have to be worried about, if you multiply or divide by a negative number, the inequality changes: example 2x-3y>15 -3y>15-2x and here we divide...
*Thursday, October 18, 2007 at 9:41pm by bobpursley*

**algebra**

simplify and write using only positive exponents. thanks. (2x^3y^4)^-2 divided by (8xy^6)^-3
*Wednesday, May 25, 2011 at 7:42pm by kristin*

**Calculus**

Let x and y be the two side lengths of the full rectangle. The length x will be divided in two. The total lengths of fence needed will be L = 2x + 3y. You know that x y = 5,189,400 ft^2 dL/dx = d/dx (2x + 3*5,189,400/x) = 2 - 15,568,200/x^2 = 0 at minimum L x^2 = 7,784,100 x...
*Monday, June 22, 2009 at 12:58am by drwls*

**algebra 2**

I am trying to factor the expression -8y^2+28y-60 but can't get an answer that is correct. Here is an example of how the problem is supposed to be factored. If you have 21x2-77x-28 the first thing you would do is (21x )(x ). Next you would find two numbers that multiplied ...
*Sunday, September 8, 2013 at 3:01pm by Kylee*

**trig**

2r - 3r sin€ = 6 2sqrt(x^2 + y^2) - 3y = 6 2sqrt(x^2 + y^2) = 3y + 6 =3(y+2) 4(x^2 + y^2) = 9(y + 2)^2
*Wednesday, March 2, 2011 at 3:53am by agrin04*

**Math**

slope = (2 + 2)/(5 - 2) = 4/3 y-2 = (4/3)(x-5) 3y - 6 = 4x - 20 4x - 3y = 14
*Saturday, April 7, 2012 at 9:23pm by Reiny*

**Intermediate Algebra**

(6xy)^-3 = 1 / (6xy)^3 = 6^3x^3y^3 = 216x^3y^3.
*Tuesday, June 19, 2012 at 9:27am by Henry*

**algebra**

First line: x=3-3y 3y=3-x Divide with 3 y=1-x/3 y= -x/3 + 1 y=(-1/3)*x +1 Second line: x+3y= -6 3y= -6-x Divide with 3 y= -2 -x/3 y= -x/3 - 2 y= (-1/3)*x -2 The equation of a straight line is usually written this way: y = mx + b m = Slope or Gradient (how steep the line is) b...
*Tuesday, May 31, 2011 at 4:32pm by Anonymous*

**Math**

8x-3y=-6 >> 8x=-6/3y >> x=-6/24y then: 8(-6/24y)-3y=-6 (-6y/3)-3y=-6 (-6y-9y)/3=-6 -3y/3=-6 y=6 then: 8x-3*6=-6 8x-18=-6 8x=-6+18 8x=12 x=12/8=3/2 so: X=3/2, Y=6
*Thursday, September 23, 2010 at 9:11am by LiNda*

**math**

this is worse than before, now I have to read it as 21xy = -2 -49x^2 = 14 it can't be that, since the second equation clearly has no real solution. I have a feeling you meant to type 7x + 3y = -2 -7x + 7y = 14 but until you clarify the equation, there is no point in working it...
*Monday, January 19, 2009 at 6:50pm by Reiny*

**Math**

the form of the equation that most students seem to learn is y = mx + b, where m is the slope and b is the y-intercept. I will use a specific example. suppose you know the slope is -2/3 and the given point is (9,1) so y = -2/3 m + b but (9,1) lies on it, so 1 = (-2/3)(9) + b 1...
*Thursday, October 2, 2008 at 4:55pm by Reiny*

**Math**

1. 4(2-a)^2 -81 = 4(4-4a+a^2) -81 = 4a^2 - 16a + 16 -81 = 4a^2 - 16a - 65 = 2. -(x-y)^3 = -(x-y)^2(x-y) = -(x^2-2xy+y^2)(x-y) = -(x^3-x^2y-2x^2y-2xy^2+xy^2-y^3) = Combine like-terms: -(x^3-3x^2y-xy^2-y^3) = -x^3 + 3x^2y + xy^2 + y^3. 3. 3x^2 -27(2-x)^2 = 3x^2-27(4-4x+x^2) = 3(...
*Monday, October 3, 2011 at 12:36am by Henry*

**Math**

1. 4(2-a)^2 -81 = 4(4-4a+a^2) -81 = 4a^2 - 16a + 16 -81 = 4a^2 - 16a - 65 = 2. -(x-y)^3 = -(x-y)^2(x-y) = -(x^2-2xy+y^2)(x-y) = -(x^3-x^2y-2x^2y-2xy^2+xy^2-y^3) = Combine like-terms: -(x^3-3x^2y-xy^2-y^3) = -x^3 + 3x^2y + xy^2 + y^3. 3. 3x^2 -27(2-x)^2 = 3x^2-27(4-4x+x^2) = 3(...
*Monday, October 3, 2011 at 12:36am by Henry*

**Trig**

I am sure you meant 2/(y+2) + 3/y = -y/(y+2) common denominator is y(y+2), so multiply each term by that 2y + 3(y+2) = -y^2 2y + 3y + 6 = -y^2 y^2 + 5y + 6 = 0 (y+2)(y+3) = 0 y = -2 or y = -3 but y cannot be -2 or else we are dividing by zero, so x = -3
*Tuesday, March 22, 2011 at 10:15pm by Reiny*

**Math Lit**

Decide whether the pair lines is parallel,perpendicular 3x+5y=6 ,3x+3Y=10
*Sunday, February 5, 2012 at 2:42pm by Anonymous*

**alg 2.**

3lnxy-2ln2y = ln(x^3y^3) - ln(4y^2 = ln [(x^3y^3)/(4y^2)] = ln [(x^3y)/4]
*Monday, May 19, 2008 at 7:32pm by Reiny*

**math**

Write that as two equations. 2x + y = 11 55x + 3y = 11 Multiply the first equation by 3 and then subtract. 6x + 3y = 33 49x = -22 That leads to the value of x. Then use any equation for y. When you wrote 5 5x did you mean to write 5x or 55x? If you meant 5x + 3y = 11, then you...
*Tuesday, October 30, 2007 at 8:14am by drwls*

**Physics**

F(1x)=F(1)=10 N F(2x)=F(2)cos60=50.5=2.5 N F(2y) =F(2)sin60 = 50.866= 4.33 N F(3x) =- F(x)=- (10+2.5 )= -12.5 N F(3y) =- F(2y)= - 4.33 N F(3) = sqrt{ F(3x)²+F(3y)²} =13.23 N tan φ = F(3y)/F(3x) =4.33/12.5=0.364 φ = 19.1⁰ (south-west)
*Saturday, May 25, 2013 at 8:23am by Elena*

**Math**

a= x b = x+7 c = 13 x^2 + (x+7)^2 = 13^2 = x^2 + x^2 +7x +7x + 49 = 169 = 2x^2 + 14x + 49 = 169 = 2x^2 + 14x + 49 -169= 169-169 = 2x^2 + 14x -120 = 0 = x^2 +7x -60 = 0 (x -5)(x+12)= 0 x = 5 x = -12 ignored when it is negative a= 5 b = 12
*Saturday, July 27, 2013 at 11:16pm by Chol*

**math**

expand a simplify the first three terms of each binomial power a. (2z*3 - 3y*2)*5 b. (3b*2 - 2/b)*14 c. (5x*3 + 3y*2)*8 d. (sqrt.a + sqrt.5)*10 sqrt= square root
*Tuesday, January 14, 2014 at 11:09pm by cathy*

**Algebra, please help quick**

simlify the following to the lowest terms: (a) [x^2-y^2]/[x^2+y^2] (b) [3a^2+6ab-a-2b]/[9a^2-6a+1] (c) [x^4-y^4]/[x^3-y^3] (d) [36x^3y^4z]/[64x^5y^2z^3]
*Tuesday, February 19, 2013 at 4:55am by Jeconiah*

**calculus**

Evaluate the following line integral: ∮C[(4x^2+3x+5y)dx+(6x^2+5x+3y)dy] where C is the path around the square with vertices (0,0),(2,0),(2,2) and (0,2).
*Tuesday, March 5, 2013 at 4:39pm by Anonymous*

**calculus**

Evaluate the following line integral: ∮C[(4x^2+3x+5y)dx+(6x^2+5x+3y)dy] where C is the path around the square with vertices (0,0),(2,0),(2,2) and (0,2).
*Tuesday, March 5, 2013 at 10:57pm by Anonymous*

**bobpursly,.math**

Ok, assume it equals zero. 2x + 3y -6=0 subtract 3y from each side. add six to each side. divide both sides by two. its how its in the book i'm suppost to solve for x. but how? How do I solve for the following: Directions solve each literal equation for the individual variable...
*Tuesday, December 19, 2006 at 9:29am by bobpursley*

**math**

it usually takes two steps, 1. "move" all terms except the y term to the right side ---> -y = -7x + 7 2. divide each term by the coefficient of the y term ---> divide by -1 y = 7x - 7 #2. 15x + 3y + 2 = 9x + 14 - try it using my 2-step method
*Tuesday, January 28, 2014 at 8:45pm by Reiny*

**math**

first get rid of that useless mixed fraction. -7x-24=-79/3 now multiply each term by -3 to get rid of fractions and all those negative signs 21x + 72 = 79 21x = 7 x = 7/21 = 1/3
*Wednesday, August 10, 2011 at 12:58am by Reiny*

**MATH**

to Eliminate x x - y = -1 3x + 5y = 21 multiply (x - y = -1) by -3 -3x + 3y = 3 3x + 5y = 21 add both equations 0 + 8y = 24 8y = 24 y = 3
*Thursday, January 13, 2011 at 7:49pm by helper*

**math**

Common denominator = 35y: 3x/5y + 1/7 = (21x + 5y) / 35y.
*Monday, October 18, 2010 at 3:31pm by Henry*

**Lines and Slopes Math**

A line is perpendicular to x+3y-4=0 and has the same y-intercept as 2x+5y-20=0. Find an equation for the line
*Thursday, January 6, 2011 at 11:46pm by Mathew*

**Intermediate Algebra**

Simplify the following exponents and rewrite it in an equivalent form with positive exponents..24x^3y^-3/72x^-5y^-1
*Friday, March 30, 2012 at 9:43pm by sherry*

**Algebra 1 Answer Evaluation **

Factor. 1. 30y^3 - 50y A: 10y(3y - 5y) 2. Factor a^2 - 5a^2 + 2a -10 by grouping. A: ?
*Monday, March 24, 2014 at 6:06pm by Anonymous*

**Algebra**

Solve the following system by graphing. If there isn't a unique solution to the system 5x-3y=-36 3x+5y=26
*Monday, March 31, 2014 at 1:34pm by Shirley*

**Algebra II**

<<I multiplied (7x)(7x) first and got x squared + 14x + 49.>> Well you did that wrong, as well as some other steps. (7x)^2 = 49x^2 The polynomial you wrote is (x+7)^2 5x^3*(7x)^2 = 5*49 x^5 = 245 x^5
*Sunday, February 3, 2008 at 11:43am by drwls*

**Algebra**

I am pretty sure this goes like this 4y+3=3y+x (i) 2x+4y=18 (ii) Rearrange (i) so that x=4y+3-3y Take (ii) and sub x it will become 2(4y+3-3y)+4y= 18 2(y+3)+4y =18 2y+6+4y=18 6y+6=18 6y=18-6 6y=12 y=12/6 y=2 (iii) Now use what you found for y in (iii) and sub in the (ii or i ...
*Friday, February 22, 2013 at 9:21pm by Alex*

**algerbra!**

7(n+1)-4n=4 7n + 7 - 4n = 4 3n = -3 n = -1 -7(x-3)=-14 -7x + 21 = -14 -7x = -35 x=5 8=3+5(y-2) 8 = 3 + 5y - 10 15=5y y=3 2(x-3)+3(x-1)=-5 2x -6 + 3x - 3 = -5 5x = 4 x= 4/5
*Monday, September 15, 2008 at 9:24pm by Anonymous*

**Pre-calculus**

y = (-3x+2) / (2x-1), x = (-3y+2) / 2y-1), Cross multiply: -3y + 2 = 2xy-x, -3y - 2xy = -x-2, y(-3-2x) = -x -2, y = (-x-2) / (-2x-3). -2x-3 = 0, -2x = 3, X = -3/2. Domain = All real values of X except -3/2. Range = All values of y resulting from inputs (x) within the domain. -...
*Sunday, December 4, 2011 at 6:25pm by Henry*

**Algebra: please check**

There are several ways to write the equation of a straight line. The way troy showed you is the y-intercept-slope form. Your starting equation suggests that you have learned the point-slope form continue from y-2=1/3(x-1) by multiplying both sides by 3 to avoid fractions ... ...
*Tuesday, June 8, 2010 at 12:10am by Reiny*

**Algebra **

First factor out y. y(3y^2+15y+18) What multiplies to give you 18 and adds to give you 15? y(3y+6)(y+3) I hope this helps.
*Thursday, March 11, 2010 at 8:13pm by PsyDAG*

**10th grade**

If you have a graphing calculator just plug in y= (-4/3)x+(4/3) 4x+3y=4 -4x -4x 3y = -4x+ /3 /3 y = (-4/3)x+(4/3) I used (parenthesis) to show fractions.
*Wednesday, October 27, 2010 at 5:50pm by Nate*

**math**

This question has been posted before. Was it by you? There is no solution because the two lines x + 3y = 7, and x + 3y = 8 are parallel and do not intersect. You have already added "no solution" to your question. So what are you asking it?
*Wednesday, January 7, 2009 at 9:04am by drwls*

**math**

Replace x in the first equation with 3y + 4, and solve for y. First step: 3(3y +4) -2y = 2 Second step: 7y +12 = 2 Take it from there . The answers (x and y) are not integers
*Monday, February 15, 2010 at 5:46pm by drwls*

**Algebra 1a**

Solve the following system of equations. x+3y=6 x=8-3y What is the solution of the system? Type the ordered pair or indicate if there is no solution. Thank you very much
*Wednesday, May 26, 2010 at 7:00pm by Nikki*

**algebra**

6/y+2-4=y+20/3y+6 Multiply by 3y. 18 + 6y - 12y = 3 + 20 + 18y Combine y terms and numerical terms -5 = 24y Do you think you can take it from there?
*Thursday, June 3, 2010 at 11:03pm by PsyDAG*

**alg2 help**

[4x/ 3y]^2 it should look like 4x over 3y in parenthesis ^2 at the top right. please take me step by step I got 1.6
*Sunday, July 14, 2013 at 8:55pm by tyneisha*

**math**

to find the slop solve for y. so for 5x+3y=6 put the y terms on one side and them divide through by the coeficient of y. 3y=5x+6 -divide thru by 3 y=5/3x+2
*Tuesday, April 21, 2009 at 10:40am by Riley*

**Math**

first one: 3(2y-4)=9-3(y+1) 6y - 12 = 9 - 3y - 3 6y + 3y = 6+12 9y = 18 y = 2 2nd: (x+5)(x-3)=9 x^2 - 3x + 5x - 15 = 9 x^2 + 2x - 24 = 0 (x+6)(x-4) = 0 so x+6 = 0 or x-4 = 0 x = -6 or x = 4
*Sunday, December 12, 2010 at 5:06pm by Reiny*

**Calculus**

Hmm. I get y^3 + 2x^2 = 1 3y^2 y' + 4x = 0 y' = -4x/(3y^2) y(1) = -1, so y'(1) = -4/3 so, now you have a point (1,-1) and a slope: -4/3 y+1 = -4/3 (x-1) I assume that massaging that to slope-intercept form presents no problems...
*Monday, April 1, 2013 at 2:22pm by Steve*

**Calc**

I have 3 choices for that A 4x -3y + 25 = 0 B 4x + 3y - 25 = 0 C 3x + 4y -24 = 0 i dunno what is the correct answer
*Monday, December 14, 2009 at 9:04am by Janice*

**Geometry**

Find the measure of each side of isosceles triangle ABC with AB = BC if AB = 4y , BC = 3y + 2 , and AC = 3y.
*Tuesday, October 19, 2010 at 10:40am by Rhonda*

**math**

sorry. didn't see the first line. clear the fractions 15 + 3y = 5x and collect terms 5x - 3y - 15 = 0
*Friday, September 23, 2011 at 12:57pm by Steve*

**algebra**

from the 2nd: x = 3y+6 sub into 1st 9(3y+6) - 6y = -30 27y +54 - 6y = -30 21y = -84 y= -4 then x = 3(-4) + 6 = -6 x=-6 , y = -4
*Monday, December 17, 2012 at 8:43pm by Reiny*

**College Algebra**

What is the leading coefficient and degree in these two problems? 1). 4x^3y - 3xy^2 + x^2y^3 2). -x^5y + 2x^2y^2 + xy^4
*Tuesday, October 2, 2007 at 1:08am by Courtney*

**Math**

5s7t-7+9s+4t-6 9X-5Y-9X-6Y+10 5X2-3Y+8X2-6X+4Y i DON'T UNDERSTAND
*Monday, January 11, 2010 at 8:17pm by Kaleigh*

**algebra 2**

Identify the point of intersection listed below each system of linear equations that is the solution of that system. 2x+5y=10 x-3y=-6 (5,0);(0,2); (3,1)
*Tuesday, January 4, 2011 at 1:04am by Misty*

**Math**

Factor 1. a^4-16 2. (m-n)^2-(2m+3n)^2 3.2x^4y^4-6x^5y^3+8x^3y 4.12m^2n^3+18m^3n^2
*Sunday, October 2, 2011 at 2:53am by Melissa*

**algebra ll**

solve the system of equations 4x - 3y= 8 2x+ 5y= 9 thanks for the hint but i think the answer is (1/2,2) or(2,1) if wrong please reply bobpursley and show work so ican understand
*Tuesday, August 12, 2008 at 7:11pm by adam*

**algebra**

It would help if you proofread your questions before you posted them. I assume the top equation is -4x+3y = 3. Multiply that equation by 3. I assume the second equation is 7x + 9y = 6. -12x + 9y = 9 7x - 9y = 6 Add the two equations. -5x = 15 Take it from there.
*Sunday, January 26, 2014 at 9:12pm by PsyDAG*

**Calculus Help Please!!! Urgent!!!**

-6x/y^5 is not the answer 3x^2 - 3y^2 y' = 0 now use the quotient rule: y" = (2xy^2 - 2x^2y y')/y^4 = 2x(y-xy')/y^3 = 2x(y-x(x^2/y^2))/y^3 = 2x(y^3-x^3)/y^5 or, use implicit differentiation twice: x^3-y^3 = 3 3x^2 - 3y^2 y' = 0 6x - 6y(y')^2 - 3y^2y" = 0 y^2 y" = 2x - 2y(y')^2...
*Wednesday, April 9, 2014 at 1:35pm by Steve*

**Math - PreCalc (12th Grade)**

Use the inverse matrix to solve this system of equations: 4x+3y=7.5 7x+9z=14 4y-z=8.3 4,3,0 7,0,9 0,4,-1
*Friday, March 21, 2014 at 9:20am by Shawna*

**math**

1/(2y) + 3/(2x) = x/(2xy) + 3y/(2xy) = (x+3y)/(2xy) and now it's easy, eh?
*Thursday, September 26, 2013 at 9:03pm by Steve*

**Algebra 2**

Before I go on and give you the problenms let me explain. i am not some lazy kid trin to get people to do my homework over the internet. I am freshman that just recently skippeda garde in math and I need some help. The problems below are from my pop quiz out of the text book i...
*Sunday, October 21, 2007 at 8:01pm by Allen*

**Algebra 2**

Before I go on and give you the problenms let me explain. i am not some lazy kid trin to get people to do my homework over the internet. I am freshman that just recently skippeda garde in math and I need some help. The problems below are from my pop quiz out of the text book i...
*Sunday, October 21, 2007 at 8:02pm by Allen*

**Math please help!!**

Rewrite your system: y+2x=5 3y+x= -5 2x+y=5 x+3y= -5 In google type: solve system substitution When you see list of results click on: SolverSOLVE linear system by SUBSTITUTION When page be open in first roow type 2x+1y=5 In second roow type: 1x+3y= -5 and clic option Solve You...
*Monday, February 28, 2011 at 6:34pm by Anonymous*

**algebra 2**

same thing with 4. Eliminate z, then work with w,x,y add 1&2, subtract 3 from 2*1, add 1&4 to get 3w+3y = 3 3w+3y = 6 4w+2x+2y = 7 I can see a big problem already.
*Wednesday, October 16, 2013 at 4:15pm by Steve*

**MATH**

2X-3Y=5 -2X -2X -3Y=5-2X DIVIDE BOTH SIDES BY -3 Y=-5/3+2/3X NOW DO THE SAME FOR THE OTHER ONE PLUG THE -2 IN FOR X Y=-5/3+2/3(-2) PUT IN CALC WATCH SIGNS!! Y=-3
*Monday, December 9, 2013 at 12:58pm by SAM*

**Math**

What is 5+7x+2x-3+6 simplified, x+y+4x-3x+2y+3y simplified
*Tuesday, September 6, 2011 at 5:12pm by Aaron*

**Math**

Is this right I have to set it to y=? 3x-y=9: y=-9+3x How would you set these two problems to y=? 3y=x+6 4x+3y=12
*Sunday, February 21, 2010 at 2:06pm by Ryan*

**geometry**

3y + 2x + 12 = 0. y = mx + b, Solve the given Eq for y: 3y = -2x - 12, Divide both sides by 3: y = (-2/3)x - 4.
*Monday, November 1, 2010 at 3:24pm by Henry*

**algebra**

Simplify 5x^7y^6/ 4y^6x^3*7x^3y^4/6x^2y^5
*Tuesday, February 3, 2009 at 10:39pm by kate*

**algebra**

Simplify 5x^7y^6/ 4y^6x^3 * 7x^3y^4/6x^2y^5
*Tuesday, February 3, 2009 at 10:39pm by kate*

**correct , math**

Directions: Facotor each of the following polynomials completely. 14x ^2 -20x + 6 the answer that i got was: 7x^2-10x+3= (7x-3)(x-1) not quite. You left out the two, you just cant throw it away. 2(7x-3)(x-1) can you show me please the steps I am getting confused.
*Friday, February 9, 2007 at 2:49am by jasmine20*

**Math (URGENT)**

Expand and simplify. 12-2(3y-2)(3y+2)-(2y+5)(2y+5) Textbook Answer: -22y^2-20y-5 I don't know how to get that. Can someone show me the step by step process? thank you very much.
*Thursday, April 22, 2010 at 11:07pm by John*

**math**

DETER MINE THE PRODUCT OF THE FOLLOWING.1.(3Y+4X)(3Y-4X) 2.(p1/2Q)2 3.(A+BC)(2X-4B) 4.(X-1)(X2+2X+3) 5.(A+2B)(-3A2+2AB+2B2)
*Tuesday, January 24, 2012 at 2:33pm by Anonymous*

**math**

DETER MINE THE PRODUCT OF THE FOLLOWING.1.(3Y+4X)(3Y-4X) 2.(p1/2Q)2 3.(A+BC)(2X-4B) 4.(X-1)(X2+2X+3) 5.(A+2B)(-3A2+2AB+2B2)
*Tuesday, January 24, 2012 at 2:40pm by Anonymous*

**Math 3**

this is the easiest way based on the fact that for Ax + By + C = 0, the slope is -A/B slope of line is (6-5)/(4-1) = 1/3 so the equation must be x - 3y + c = 0 plug in (1,5) 1-15 + c = 0 c = 14 so x - 3y + 14 = 0 from there you can change it to any form that was asked for
*Wednesday, May 2, 2012 at 7:51pm by Reiny*

**college Algebra**

First you need to replace the x in the original equation with the given variable 48-7y 8(48-7y) + 3y = -40 384 -56y +3y=-40 -56y + 3y = -40 - 384 -53y = -424 -53y/-53=-424/-53 y=8 x=-8 Ordered pair (8,-8)
*Wednesday, April 21, 2010 at 8:41pm by Mrs P*

**calculus**

a) Assuming you meant x^3 + y^3 - x y^2 = 5 3x^2 + 3y^2 dy/dx - x(2y)dy/dx - y^2 = 0 dy/dx(3y^2 - 2xy) = y^2 - 3x^2 dy/dx = (y^2 - 3x^2)/(3y^2 - 2xy) b) just arithmetic, you do it c) yours d) for a horizontal tangent, dy/dx = 0 then y^2 - 3x^2 = 0 y^2 = 3x^2 y = ± x√3 ...
*Wednesday, March 13, 2013 at 9:12pm by Reiny*

**Math 141**

I am having trouble with this problem. perform the indicated operations and simpily the result as much as possible a) (3x - 2) (x^2 + 2x - 4 ) the answer i got so far is 3x^3 + 4x^2 -16x + 8. Am i done or i have to conitnue to simplify? if so, what do i need to do? b) 10x^3y^2...
*Saturday, April 7, 2012 at 3:36pm by John Terry*

**math**

Trial and error really for x and y being whole numbers. You have to see, for example, how many 2's [the 2x bit] to take away from 4 [on the RHS] before it's divisible by -3 [from the 3y bit] For example, from -3y = 4 - 2x x = 5 will give -3y = 6 which means y = -2 The best ...
*Friday, March 20, 2009 at 7:52pm by GanonTEK*

**math algebra please help!**

x + y = 670 and 7x + 5y = 3740. With two equations, you have enough information to solve for both x and y. Multiply both sides of the first equation by 7 7x + 7y = 4690 Subtract the previous equation from that 7x + 5y = 3740 _______________ 2y = 950 y = 475 x = 670 - 475 = 195
*Monday, February 9, 2009 at 11:27pm by drwls*

**one more question1**

can anyone please help me with understanding how to graph equations such as 2x-3y=9, 6x-5y+20=0, -2x=2y +5, and y=-2. Thnx!
*Wednesday, February 11, 2009 at 8:01pm by anonymous*

**Algebra 1**

cost of plain pizza --- x cost per topping -----y x + 3y = 15.25 x + 5y = 17.75 subtract them 2y = 2 continue .....
*Wednesday, November 14, 2012 at 1:54pm by Reiny*

**Math**

Can somebody please explain to me how to factor trinomials that contain two unknown variables and are complex sum & product?? Examples: 2x^2 + 13xy + 15y^2 11x^2 + 14xy + 3y^2 I understand how to factor trinomials that only have x as the variable, but please someone help with ...
*Wednesday, April 4, 2007 at 7:04pm by Danielle*

**math**

Thanks, it's much easier when you pin-point the problem! In general, the coefficients of x and y are not the same between the two equations. When you want to eliminate y, and the coefficients are not the same, you find the LCM (lowest common multiple) of the two coefficients ...
*Monday, June 1, 2009 at 5:13pm by MathMate*

**math**

solve for x and y when 5x-3y-2=0 and 7x+y=0. Please this is sooo hard. no clue how to do it. please show me how to do it.
*Monday, February 16, 2009 at 12:38am by neil hannit*

**Math**

gather up the y's on one side: 7x+3y = 19-10 10y = 9 y = 9/10
*Wednesday, October 9, 2013 at 7:13pm by Steve*

**Algebra 1**

-2x + y = 2 2x + 3y = 5 x + 2y = -13 9x +7y = -3 7x + 9y = -30
*Thursday, November 21, 2013 at 10:26pm by Kuai*

**Pre-Algebra**

1. 3w 10w 13w 7w 7 7w 2. y + 2y +3z 2y + 3z 3y + 3z 2y2 + 3z 6yz 3. 6r + r 5r 2r 1r + r 0r 7r 5r 4. 5x + 2(x + 6) 7x + 6 7x2 + 12 7x + 12 7x (x + 6) 5. 3m + 3(m + 6) 6 6m + 6 6m + 18 18
*Monday, November 26, 2012 at 3:38pm by Jman*

**Math help :(**

1. 3w 10w 13w 7w 7 7w 2. y + 2y +3z 2y + 3z 3y + 3z 2y2 + 3z 6yz 3. 6r + r 5r 2r 1r + r 0r 7r 5r 4. 5x + 2(x + 6) 7x + 6 7x2 + 12 7x + 12 7x (x + 6) 5. 3m + 3(m + 6) (1 point)6 6m + 6 6m + 18 18
*Wednesday, December 18, 2013 at 3:21pm by Princess Anna*

**Math help**

Can someone check my answers on these? Thank you!! Solve each system using addition or subtraction. 1. x+y=8 x-y=4 For the solution I got (6,3) 2. x-3y=7 x+2y=2 For the solution I got (4,-1) 3. 5s+2t=6 9s+2t=22 For the solution I got (-4,13) 4. 2x+3y=13 x-3y=2 For the ...
*Thursday, January 23, 2014 at 6:44am by Anonymous*

**math**

Help?Simplify each expression.1. 3w 10w a. 13w b. 7w c. 7 d. 7w 2. y + 1.2y +1.2z a. 2.4yz b. 1.3y + 1.2z c. 1.2y2 + 1.2z d. 2.2y + 1.2z 3. 6r + r 5r a. 2r b. 1r + r c. 0r d. 7r 5r 4. 5x + 2(x + 6) a. 7x + 6 b. 7x2 + 12 c. 7x + 12 d. 7x (x + 6) 5. 3m + 3(m + 6) a. 6 b...
*Friday, November 22, 2013 at 12:55pm by Anonymous*

**Calculus**

x² - 2xy + y³ = c 2x - 2y - 2xy' + 3y² y' = 0 2(x-y) + y'(3y²-2x) = 0 y' = 2(y-x)/(3y²-2x)
*Tuesday, October 4, 2011 at 11:32pm by Steve*

**Calculus**

x^2 - 2xy + y^3 = C 2x - 2y - 2xy' + 3y^2 y' = 0 y'(3y^2 - 2x) = 2(y-x) y' = 2(y-x)/(3y^2 - 2x)
*Monday, April 29, 2013 at 10:19pm by Steve*

**Algebra**

easiest way: since the slope is -2/3, the equation must look like this: 2x + 3y = C plug in the point (-5,-5) -10 - 15 = c = -25 2x + 3y = -25 re-arrange if needed.
*Sunday, October 20, 2013 at 10:23pm by Reiny*

**Pre-Calculus**

since the line is perpendicular, their slopes are negative reciprocals of each other, that means, they must be OPPOSITE in sign so first slope = -3/2 2nd slope = +2/3 y-2 = (2/3)(x-4) 3y-6 = 2x-8 3y = 2x - 2 y = (2/3)x - 2/3
*Tuesday, November 19, 2013 at 8:22am by Reiny*

**Math**

3y+24/2y=9, multiply both sides by 2y, then you get 3y+24=18y..I think you can go from there
*Thursday, July 22, 2010 at 11:29pm by Jen*

**math**

Get rid of parenthesis. 2y+y^2-xy-xy+y-3y^2 Combine like terms. 3y - 2y^2 -2xy
*Wednesday, August 3, 2011 at 11:09am by PsyDAG*

**math**

steve, i still have two question I don't understand. 1. x=3y-2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?
*Sunday, January 13, 2013 at 2:27pm by gary*

**math**

steve, i still have two question I don't understand. 1. x=3y-2/4,what is the value of y in terms of x ? 2. x=y^3/3y^2+y/2,what is the value of y in terms of x ?
*Sunday, January 13, 2013 at 2:27pm by gary*

**Algebra 1**

Okay. So I am completely lost with this... Any help would be great! 3. Solve the system using any method graphing, substitution, or linear combination. Make sure to show your work. 2x + 5y= 8 x + 3y= 2
*Thursday, January 10, 2013 at 11:04pm by Miranda*

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