Friday

April 18, 2014

April 18, 2014

Number of results: 39,455

**mathematics**

-x(x-1) - (-4)(x-1) + 5(3x)(2x+1) - 5(1)(2x+1) -x^2+x + 4x-4 + 30x^2+15x - 10x-5 29x^2 + 10x - 9
*Sunday, March 23, 2014 at 11:58pm by Steve*

**Math 156**

On the first: THe expected value is 500/3000 or .17 dollars. second: correct third: ten can be had by 5,5, or 6,4, or 4,6 Probability is 1/36 + 2/36= 3/35 at most five means 1,1, 1,2, 1,3, 1,4, 2,3 probab is 1/36+ 2/36+2/36 + 2/36 + 2/36 or 9/36 so total prob is 12/36 or 1/3 ...
*Friday, August 7, 2009 at 1:54pm by bobpursley*

**math**

By inspection, I see that x = -1 is one solution. Therefore x+1 is a factor. Divide 2x^3 + 9x^2 +10x +3 by x-1 to get the other factor, a quadratic polynomial. You should get 2x^2 + 7x + 3, using polynomial long division. Now set that equal to zero and solve it for the other ...
*Wednesday, January 13, 2010 at 11:59pm by drwls*

**Algebra 2**

Some are already factored. Some are partially factored. Set the factors equal to zero. Example: x^3 -2x^2 +x = 0 x(x^2 -2x +1) = 0 x(x-1)^2 = 0 x = 0 or 1. The last cubic equation will be harder to factor. Hint: One solution is x = -4, so x+4 is a factor. Use polynomial long ...
*Monday, March 1, 2010 at 6:46pm by drwls*

**Calculus Optimization**

say it goes 12-x km down the shoreline, then heads offshore straight for the island. The resulting path length is 12-x + the hypotenuse sqrt(36 + x^2) cost = (12 -x)(4000) + [(36+x^2)^.5]6000 0 =dc/dx = -4000 + .5 [ (36+x^2)^-.5 ] (2x)(6000) which is 4000 = 6000x/sqrt(36+x^2) ...
*Wednesday, March 17, 2010 at 1:48pm by Damon*

**Math - Exponential**

Please check if my answers are correct! Thank you. Differentiate f(t) = √(36 ln(t) + 5t) f'(t) = (1/2) * (36 ln(t) + 5t)^-1/2 * (36/t + 5) f'(t) = (1/2)* (36/t + 5)/((36 ln(t) + 5t)^1/2 f'(t) = (36 + 5t) / (2t √(36lnt + 5t)) ----- Find the largest & smallest values...
*Saturday, January 17, 2009 at 1:21pm by Anonymous*

**math**

Find the expected value, ì, for the sum of two fair dice. The probability distribution for the sum of two dice is given in the table. ì = 1 2=1/36, 3=2/36, 4=3/36, 5=4/36, 6=5/36, 7=6/36, 8=5/36, 9=4/36, 10=3/36, 11=2/36, 12=1/36
*Saturday, October 9, 2010 at 7:53pm by Anonymous*

**math**

Find the expected value, u, for the sum of two fair dice. The probability distribution for the sum of two dice is given in the table. u = 1 2=1/36, 3=2/36, 4=3/36, 5=4/36, 6=5/36, 7=6/36, 8=5/36, 9=4/36, 10=3/36, 11=2/36, 12=1/36
*Sunday, October 10, 2010 at 6:46pm by Anonymous*

**algebra**

Factor completely with respect to the integers. I just need to see if I can simplify or factor the answers I got even further. 1. x^3 + 64 Answer: (x+4)(x^2-4x+16) Can this simplify any? 2. 8x^3 - 64 Answer 8(x-2)(x^2+2x+4) 3. x^-2x^2+4x-8 Answer: (x^2+4)(x-2) 4. 2x^3 + 3x^2...
*Wednesday, January 10, 2007 at 3:00am by anonymous*

**math**

2x^2 + 6x +3 = 0 That does not factor into terms with integers. Use the quadratic formula x= [-b +/-sqrt(b^2-4ac)]/2a x = [-6 +/-sqrt(36 -24)]/4 = [-6 +/-sqrt12]/4 = -2.366 or -0.634
*Monday, November 26, 2012 at 5:56am by drwls*

**algebra**

factor: 9w - w^3 = 3w(3-w^2) m^4 - n^4 = (m-n)^2(m-n)^2 are these correct? the next few I wasn't sure how to work... factor: 2h^2 - h - 3 = 0 x^2 - 36 = 0 x^3 = 4x
*Saturday, January 24, 2009 at 3:44pm by kayla*

**physics**

Hint: Use Coulomb's Law. Increasing the separation by a factor of 6 will decrease the (attractive) force by a factor of 36.
*Monday, February 4, 2013 at 8:24am by drwls*

**math**

Let P = x, then C = x +19 and M = 2x - 36 x + (x+19) + (2x-36) = 399 Calculate x, then the others.
*Wednesday, December 12, 2012 at 1:47am by PsyDAG*

**Algebra 1**

Let x = time in hours Since their costs must be the same, 100 + 15x = 75 + 17x Solving, 100 - 75 = 17x - 15x 25 = 2x x = 25/2 or 12.5 hours Hope this helps~ :3
*Tuesday, October 8, 2013 at 12:14am by Jai*

**math**

Just factor the equation -2x²+2x+4 = 0 or the equivalent equation x^2 -x +2 = 0 which you can get by dividing both sides by -2. Hint: one factor is x-2, and that tells you that one solution is x=2.
*Monday, November 24, 2008 at 12:26am by drwls*

**Simplifying Rational Expressions**

1.4x12 / 4x 2.d+7 / d^2-49 3.t^2-25 / t^2+t-20 4.2x^2+6x+4 / 4x^2-12x-16 5.6-y / y^2-2y-24 1. 12 [4x] cancels out. so you're left with just 12. 2. 1/d-7 factor the d^2-49 to (d+7)(d-7). cancel out the (d+7) 3. (t-5)/(t-4) factor both numerator and denominator. so then it's: (t...
*Sunday, March 11, 2007 at 11:33pm by mike*

**MATH**

9x^2 + 5x - 4 the AC method Multiply the 9 times -4 You have -36 think of factors that will multiple to equal -36 but add to equal the middle number 5. 36 times -1 no 9 times -4 yes Sometimes it takes awhile to find the right numbers. Once you do, you write them and -4x + 9x ...
*Thursday, February 21, 2013 at 8:00pm by JJ*

**algebra**

what is the GCF of -x^9, -3x^3, -15x^5? I think the only common factor is x am I right?
*Friday, January 8, 2010 at 12:54pm by Sam*

**Factor**

How do I factor these: 2x2 - 16x + 30 4x^2-9 x^2-5x 5x^2-26x+5 25x^2+4 Example: 2x^2 - 16x + 30 = 2 (x^2 - 8 x + 15) 2(x - 5)(x - 3) The first, factor out a 2 first. Then factor . The second...difference of two squares Third factor out an x I will be happy to critique your ...
*Sunday, July 8, 2007 at 6:12pm by mike*

**precalculus**

use remainder therem to find the remainder when f(x) is divided by x+2 then use factor to determine whether x +2 is a factor f(x) = x^6 + 2x^5 + 3x^2 - 2x - 16
*Sunday, September 25, 2011 at 4:21pm by amy*

**Please Help!!!! Maths**

x^2-6x+1 = (3x+5)/2. Multiply both sides by 2: 2x^2-12x+2 = 3x+5 2x^2-15x-3 = 0 Use Quad. Formula and get: X = 7.695, and -0.195
*Thursday, April 4, 2013 at 4:48pm by Henry*

**Algebra (correction)**

First of all 1/6 * 1/6 = 1/36 ≠ 1/12 However, the matched pair can be 1s, 2s, 3s, 4s, 5s or 6s. The either-or probability is found by adding the individual probabilities. 1/36 + 1/36 + 1/36 + 1/36 + 1/36 + 1/36 = 6/36 = 1/6
*Thursday, September 30, 2010 at 8:44pm by PsyDAG*

**math**

Cancel the common factor 2x that appears in both numerator and denominator. x = -30x/2x^2 = -(15*2x)/(2x*x)] = -15/x
*Wednesday, March 3, 2010 at 9:28pm by drwls*

**algebra**

this is what u do on your first problem....first u take out the greatest common factor that would go into all of them... 4n^2-20n+24...now what number will go into all of them...well 4 will...4 will go into 4,20,and 24...so. it would be like this..4(n^2-5n+6)...then theirs one...
*Monday, November 13, 2006 at 7:40pm by sheila*

**College Algebra**

Possible rational zeros: ± 1, ± 1/2 f(1) = 2 - 1 + 2 - 1 ≠0 f(-1) = -2 - 1 - 2 - 1 ≠0 f(1/2) = 1/4 - 1/4 + 1-1 = 0 , yeahh, (2x - 1) is a factor Using long division... 2x^3-x^2+2x-1 = (2x - 1)(x^2 + 1) so x = 1/2 or x^2 = -1 x = 1/2 or x = ± i so the only real zero...
*Wednesday, March 27, 2013 at 8:15am by Reiny*

**math: factoring**

isn't (p+q^3) a common factor? so .. 2x^2(p + q^3) - (p + q^3) = (p+q^3)(2x^2 - 1) if you are restricted to rational coefficients, you are done, if not you could say =(p+q^3)(√2x - 1)(√2x + 1)
*Friday, March 20, 2009 at 9:49pm by Reiny*

**calculus**

I got this for y. 2x^2y-2xy+x-y=0 2x^2y-2xy+x=y 2x^2-2x+x=1 (divide thru by y) 2x^2-x-1=0 what do I from here? It doesn't factor evenly. I'm stuck!
*Thursday, April 2, 2009 at 1:14pm by Anonymous*

**mth**

1.What is he greates common factor of 36 and 24 A.9 B.12 C.18 D.108 B? Erin needs to find the greatest commo factor of 24 and 18 to help her find it answer each part below. A. list the factor pairs of 24 1x24 2x12 3x8 4x6 B.Factor pairs for 18 1x18 2x9 3x6 C.Common factors of ...
*Tuesday, September 18, 2012 at 6:01pm by Lance*

**math**

Andrew factored the expression 54x^3-30x^2+15x as 5x(9x^2-6x+3) but when Melissa applied the distributive law and multiplied out 5x(9x^2-6x+3). she got 45x^3-30x^2+15x. thus andrew's solution does not appear to check. why is this? eplain your reasoning and correctly factor the...
*Friday, February 11, 2011 at 10:10pm by Nick*

**algebra**

Andrew factored the expression 54x^3-30x^2+15x as 5x(9x^2-6x+3) but when Melissa applied the distributive law and multiplied out 5x(9x^2-6x+3). she got 45x^3-30x^2+15x. thus andrew's solution does not appear to check. why is this? eplain your reasoning and correctly factor the...
*Friday, February 11, 2011 at 11:03pm by Crystal*

**algebra**

Factor completely first look for a common factor and check by multiplying If polynomialis a prime state this 27m^2-36+12
*Thursday, February 10, 2011 at 8:29pm by Laura*

**math**

Factor completely first look for a common factor and check by multiplying If polynomialis a prime state this 27m^2-36+12
*Thursday, February 10, 2011 at 9:23pm by laura*

**math**

Factor completely first look for a common factor and check by multiplying If polynomialis a prime state this 27m^2-36+12
*Thursday, February 10, 2011 at 10:16pm by laura*

**Math**

since we know 3 is a roots, x-3 must be a factor, so 2x^3 - 11x^2 + 12x + 9 = (x-3)(2x^2 - 5x - 3) = (x-3)(x-3)(2x+1) so .....
*Thursday, October 18, 2012 at 9:00am by Reiny*

**Math**

A stunt pilot is testing a new plane. The equation that models his height over time is f(x)=15x^2 -195x +950, where x is his the time in seconds and (fx) is his height in metres. Determine when the pilot is below 500 metres. I subbed in 500 for f(x) f(x)=15x^2 -195x +950 500...
*Monday, December 19, 2011 at 2:50pm by Elli*

**math**

crewneck sweatshrit-x hooded-2x x+2x=36 3x=36 x=12(crewneck) 2x=2(12)=24 (hooded)
*Sunday, September 29, 2013 at 11:02am by Anonymous*

**Math**

You can use synthetic long division, but you will find that 2x-5 is not a factor of x^3 + 2x^2 -x -2. You get something like x^2/2 + (5/4)x + 25/8 + ?/(2x-5)
*Sunday, November 2, 2008 at 6:57am by drwls*

**Algebra**

I spend hours trying to factor an equation! I need help trying to factor 2x^2+19x+24 Hours? (2x+3)(x+8)
*Sunday, May 13, 2007 at 2:36pm by Avalon*

**Trigonometry**

surely you got as far as evaluating the discriminant: b^2 - 4ac = 7 - 0 = 7 factor: x(2x+7) = 0 a product is zero if any factor is zero. So, x=0 or (2x+7) = 0 so, the roots are 0 and -7/2 Using the quadratic formula, we have x = [-7 +/- sqrt(49-0)]/4 = [-7 +/- 7]/2 = 0 or -7/2...
*Thursday, November 17, 2011 at 6:52pm by Steve*

**algebra**

Let's take a look at your problem: 2x^2 + 13x - 7 = 27 First, set the equation equal to 0 by subtracting 27 from both sides of the equation (whatever operation you do to one side of an equation you must do to the other side as well): 2x^2 + 13x - 7 - 27 = 0 2x^2 + 13x - 34 = 0...
*Wednesday, March 21, 2012 at 7:44pm by MathGuru*

**math**

common factor is (x^2 + 2x)^(-1/2) so (x^2 + 2x)^(-1/2)[2x^3 - x^2 - 2x]/x^2 = x(x^-1/2)(x+2)^(-1/2)[x^2 - x - 2]/x^2 = x^(-1/2)(x+2)^(-1/2)(x-2)(x+1)/x = (x-2)(x+1)/[x^(3/2)(x+2)^(1/2)]
*Monday, March 22, 2010 at 3:02am by Reiny*

**Algebra**

Here's (a): {[4x^2-49]/[8x^3+27]} *{ [4x^2+12x+9]/[2x^2-13x+21]} 4x^2-49 = (2x-7)(2x+7) 8x^3+27 = (2x+3)(4x^2-6x+9) 4x^2+12x+9 = (2x+3)(2x+3) 2x^2-13x+21 = (2x-7)(x-3) Putting it all together, you can cancel the (2x-7)(2x+3) to get (2x+7)(2x+3) / (x-3)(4x^2-6x+9) Do (b) ...
*Tuesday, February 19, 2013 at 5:56am by Steve*

**Math**

complete the square, f(x) = x^2 + 12x + 40 = x^2 + 12x + 36 - 36 + 40 = (x+6)^2 + 4 so the vertex is (-6,4) or the x co-ordinate of the vertex for f(x) = ax^2 + bx + c is -b/(2a) so x = -12/2 = -6 sub x=-6 back into the function to find f(-6) = 36 - 72 + 40 = 4 or, if you know...
*Tuesday, July 7, 2009 at 3:59pm by Reiny*

**Calculus**

#1: ∇f = 2x,2y,-1 ∇f(1,3,9) = 2,6,-1 plane: 2(x-1)+6(y-3)-1(z-9) = 0 2x+6y-z = 11 #2: at x=2,y=3, z=4 ∇f = 2xy^2,2x^2y,1 ∇f(2,3,4) = 36,24,1 plane: 36(x-2)+24(y-2)+1(z-4) = 0 36x+24y+z = 124 #3: ∇f = 2x+1/x,1/y,1 ∇f(4,1/4,2) = 33/4,4,1 plane...
*Thursday, October 4, 2012 at 1:10pm by Steve*

**calculus**

solve it just as you would for any other algebra equation. 2x(x-2)=x. Then distribute, to make 2x^2-4x-x=0, then combine like terms: 2x^2-5x=0, factor out a "x"--x(2x-5)=0, so x could equal 0 or x could equal 5/2
*Wednesday, December 1, 2010 at 1:51pm by Amy*

**calculus**

8x + 24 − 6x = 2 − x + 15x − 10 ( 8x - 6x ) +24 = ( 2 - 10 ) + ( 15x - x ) 2x + 24 = -8 + 14x 2x - 14x = -8 - 24 -12x = - 32 Divide with -4 3x = 8 Divide with 3 x = 8/3
*Monday, June 27, 2011 at 12:02pm by Anonymous*

**MathLog#4**

factor the numerator. (2x^n -1)(2x^n+1) dividing, leaving you with 2x^n+1 Well, 2(any number) is even, add one, it is always odd.
*Wednesday, April 4, 2012 at 11:15am by bobpursley*

**math**

Check for a pattern, as follows: 2x^3 - x^2 - 162x + 81 =x²(2x-1) -81(2x-1) (group terms) =(2x-1)(x²-81) (factor groups) =(2x-1)(x+9)(x-9) (diff.of 2 squares)
*Thursday, April 21, 2011 at 9:37am by MathMate*

**Geometry**

In an Equilateral triangle, all 3 sides are equal. Therefore AB = BC = CA So, 3x = 2x + 12 Subtract 2x from both sides of the equation 3x - 2x = 2x + 12 - 2x x = 12 Therefore AB = 3x = 3 x 12 = 36 Perimeter = AB + BC + CA = 3AB = 3 x 36 = 108
*Wednesday, December 29, 2010 at 8:42pm by Sudheer Edurite*

**college math**

¡Ì(2X+8)=6 then,(2X+8)=36 next,2X=28 at last, X=14
*Saturday, April 10, 2010 at 11:02am by Sun*

**Math**

Factor the polynomial X^3 + 7x^2 +15x + 9 I tried factoring by grouping. I got stuck at this part: x^2 ( x + 7 )...
*Wednesday, December 7, 2011 at 11:06pm by Tea*

**algebra**

x^(n+6) +x^(n+2) + X^n I see a common factor of x^n = x^n( x^6 + x^2 + 1) solving x^2 - 5x + 2/3 = 0 3x^2 - 15x + 2 = 0 x = (15 ± √201)/6
*Thursday, May 2, 2013 at 5:17pm by Reiny*

**Algebra**

Help I'm stuck I need to factor a trinomial expression using the AC method 15x^2 + 31x + 2
*Friday, November 1, 2013 at 2:07am by Tracy*

**math**

Are we to assume that there are only 3 colours?? then blue + red + green = total let the total be x (2/3)x + (3/8)(2/3)x + 3 = x 2x/3 + 1x/4 + 3 = x multiply each term by 12 8x + 3x + 36 = 12x 36 = x there are 36 drops check: blue = (2/3)(36) = 24 red : (3/8)(24) = 9 green: 3 ...
*Friday, March 25, 2011 at 7:36am by Reiny*

**factor**

This one was difficult for me aswell:(x+4)/5+(2x+1)/5 (x+4)/5+(2x+1)/5 The common denominator is 5. 1/5 (x+4+2x+1) You should be able to continue this from here. I hope this helps. Thanks for asking.
*Wednesday, May 23, 2007 at 10:11am by Mandy*

**math (trig)**

Prove: sin^2(x/2) = csc^2x - cot^2x / 2csc^2(x) + 2csc(x)cot(x) On the right, factor the numberator as a difference of two perfect squares. In the denominator, factor out 2cscx. You ought to prodeed rather quickly to the proof.
*Monday, July 16, 2007 at 10:04am by aziiancaligirl*

**substitution method**

1. y=x+4 y+3x 2. y=3x-10 y= 2x-5 3.x=-2y+! x=y-5 4.y=5x+5 y=15x-1 5.y=x-3 y=-3x+25 6.y=x-7 2x+y=8
*Sunday, February 1, 2009 at 5:29pm by Asal*

**Algebra**

I have worked this and checked it and it does not come out true any one help me? 3x-5(3x-7)=2(x+9)+45 3x-15x-35=2x+18+45 -12x-35=2x+63 +35 +35 -12x=2x+98 -2x -2x -10x=98 x=-98/10 x=-9 8/10 checking it i get 152 3/5 and 43 2/5 Help where did I go wrong?
*Tuesday, November 13, 2007 at 8:13pm by Christi*

**calculus differential equation**

dy/dx=2(first )/y^2 (second) y^2 dy=2(first)dx/(second) so lets look at the right side. 2(e^x-e^-x)/(e^x+e^-x)^4 factor out e^-x numerator: 2e^-x(e^2x) denominator(factor out e^-4x) e^-4x (e^2x-1)^2 so you are left on the right side: 2*e^3x(e^2x -1)/(e^2x+1) dx or = 2(e^5x)/(e...
*Saturday, February 12, 2011 at 12:53pm by bobpursley*

**Trigonometry**

3 csc(2x) = 5 csc(2x) = 5/3 sin(2x) = 3/5 2x = 36.9° or 143.1° x = 18.4° or 71.6°
*Wednesday, June 9, 2010 at 5:11pm by Reiny*

**algebra 2**

The tern 2x^ need to be explained. It needs an exponent. If you meant to write 2x^2 -13x +7 = 0, factor it as follows: (2x+1)(x-7) = 0 That should tell you that x = -1/2 or +7
*Sunday, June 1, 2008 at 7:31pm by drwls*

**math**

3X5Y/2Y8 = 15x/16. 15x/16 = 1 = The smallest whole number. 15x = 16 X = 16/15 = 1 1/15. According to my analysis, x cannot equal 0,2,4, nor 6.
*Saturday, August 3, 2013 at 6:16pm by Henry *

**Math (logarithmic functions)**

Those are the only ones I can't seem to resolve. Thank you! resolve x: 1) 9*3^0,51x = 315 2) 10*3^15x+21 =363*2^9x+51 3) log(15x^2) - log(3x) = 4*log(3) 4) log[of base 3]*(15x + 4) = 3
*Wednesday, April 6, 2011 at 8:52pm by Ralph*

**Algebra 1**

8x+2x=15x-10
*Wednesday, October 2, 2013 at 6:34pm by May*

**Algebra 1**

A. Elimination method -6x +18y = -6 6x -3y = -24 15y = -30 y = -2 x = -5 (-5,-2) B. Elimination method 7x -3y = 20 5x +3y = 16 12x = 36 x = 3 y = 1/3 (3, 1/3) C . Substitution method y =x/2 -6 2x + 6y = 19 2x + 6 (x/2 -6) = 19 2x + 3x -36 = 19 5x -36 = 19 5x = 55 x = 11 y = -1...
*Thursday, December 12, 2013 at 1:04pm by Kuai*

**Algebra/Steve**

factor it and solve ; what i do is ignore the negative in front of the x^2 for now giving you x^2 + 2x +15 take 1x from the x^2 and multiply it with the 15 giving you 15x. now figure out which to numbers multiply to make 15 (there is only 1 x 15, and 3 x 5) out of these two ...
*Friday, April 27, 2012 at 2:32pm by visoth*

**math**

sketch the image of f(x) after: a) a horizontal compression by a factor of 1/2 b) a veritcal expansion by a factor of 3 c) both transformations in parts a and c have been applied d) write the equations of the three image for a b and c i think i graphed a b and c right but i ...
*Sunday, September 21, 2008 at 6:35pm by John*

**Algebra**

4x^4-18x^2=0. I have to find out what x equals by factoring. What I did was Factor 2x^2(2x^2+-9)=0 then 2x^2(2x+3)(x+-3), resulting in -1.5 and three. But these answers are wrong according to my book. Can you show me step by step how to do this correctly? It would be a huge help!
*Wednesday, October 7, 2009 at 5:22pm by Katie*

**Math**

2x^2+x-6>0 A=2 B=1 C=-6 Multiply A and C together A=2, C=-6, 2x(-6)=-12 Find factors of -12 that add up to give you a positive value of 1, B We figure out that factors of -12 that add up to give us 1 are 4 and -3 We rewrite our equation as: 2x^2+(4x-3x)-6>0 We can group ...
*Wednesday, April 27, 2011 at 1:32pm by Brandon*

**Math**

3. Factor completely and solve. Check your solutions. Show all work. 6x^3 – 15x^2 – 36x = 0
*Thursday, November 1, 2012 at 2:22pm by Anonymous*

**Algebra 1b!**

1. Find the excluded value of x for the polynomomial expression 4x/6 a. 6 b. -6 c. 1/6 d. -1/6 2. Simplifly 3-2x/7 + 4x+5/7 a. 2x+8/14 b. 2x+8/7 <--- c. x+1/7 d. 2x+2/7 3. Simplify 6ab^6/4a^7b^10 * a^3b^4/2a^7b^6 a. 7x/8 - 2x/8 b. -5x/8 c. 3a^2b^3/4a^7b^8 d. a^2b^5/2a^7b^8...
*Monday, December 9, 2013 at 3:40pm by Selena *

**Math**

let's see ... 2x/5 - 3x + 2 ≥ x-1 multiply by 5 , the LCD 2x - 15x + 10 ≥ 5x - 5 -18x ≤ -15 x ≥ 15/18 mmmhh? could it be that your denominator is 5-3x ?? then you should have typed it like 2x/(5-3x) + 2 ...... let me know
*Sunday, March 17, 2013 at 10:43am by Reiny*

**Math**

Take out the obvious common factor xy: (4x^3)y - 9xy^3 =xy(4x^2 - 9y^2) and factor as difference of two squares =xy((2x)²-(3y)²) =xy(2x+3y)(2x-3y)
*Tuesday, June 7, 2011 at 11:19am by MathMate*

**Algebra 2**

You have not written an equation, so there is nothing to "solve". All you can do is try to simplify or factor what you have written. Factor out the ax. Use ^ for exponents. a^2x + 5a^2x^2 - 2ax = ax(a + 5ax -2)
*Sunday, August 17, 2008 at 8:56am by drwls*

**math**

y = -2 x^4 + 9 x^3 + 2 x^2 - 39 x + 18 make a table of x and y x _____ y -2 _____ 0 oh wow -1 _____ 48 0 ______ 18 +1 ______ -12 so a zero between 0 and 1 well, at least we had a zero at x = -2 so (x+2) is a factor so divide this mess by (x+2) so I have (x+2)(-2x^3+13x^2-24x+9...
*Monday, December 2, 2013 at 6:01pm by Damon*

**Calculus**

if width=x, length=y, the cost=c, we have xy = 2484 c = 16.50*2x + 18.00*(2x+2y) = 33x + 36x + 36(2484/x) = 69x + 89424/x dc/dx = 69 - 89424/x^2 dc/dx=0 when x=36 so, the cost is minimum when the pen is 36 by 69. I assume you can figure the cost.
*Sunday, July 15, 2012 at 11:15pm by Steve*

**Math**

The terms are in descending order, so a = 4, b = -35, and c = -9. find 2 numbers that when multiplied give you a * c (which is 4 * -9 = -36) and when added give you b (which is -35). Try -36 and 1. When multiplied they equal -36, and when added they equal -35. Voila! So split ...
*Thursday, April 30, 2009 at 9:42pm by RickP*

**math**

For the problem, a value of x which makes a factor 0 is a solution. (x^2-9)(2x-1) = 0 factoring (x^2-9) further (x+3)(x-3)(2x-1) = 0 For each factor, what value of x will make the term 0? The first term, (x+3), will be 0 for x=-3. The second term is 0 for x=? The third term is...
*Monday, September 15, 2008 at 7:30pm by Quidditch*

**Math**

I did factoring and got this: f(x)=15x^2 -195x +950 500 = 15x^2 -195x + 950 0=15x^2 -195x + 950 - 500 0=15x^2 - 195x + 450 0=15(x^2 - 13x + 30) 0=15(x-10)(x-3) x=10 and x=3 It doesn't seem right~
*Monday, December 19, 2011 at 2:50pm by Elli*

**algebra**

X^2 -2X = 8 In "set to zero" form: X^2 - 2X - 8 = 0 factoring: (X + ?) * (X + ?) = 0 The two different numbers that are question marks must equal 8 when multiplying them together. This would suggest trying: 1, 8 or 2, 4 Since 8 is negative, one of the values must be negative. ...
*Thursday, May 15, 2008 at 10:01pm by Quidditch*

**Math**

-3x(2x - 5) Is this -6x + 15x?
*Thursday, February 27, 2014 at 11:29am by Anonymous*

**Precalculus**

Factor completely 2(3x - 5)3(2x + 1)^3 + (3x - 5)^2 (3)(2x + 1)^2 (2) I'm not really sure how to do this problem I started out by rewriting this 6(2x + 1)^3(3x -5) + 6(3x - 5)^2(2x + 1)^2 I am unsure were do go from here...
*Tuesday, January 5, 2010 at 9:00pm by Kate*

**Algebra, factor**

Factor, lowest term: (2x^2+5x-10)=
*Saturday, March 24, 2012 at 9:40pm by Libuse*

**math**

if (2x-3):(y+4)=k where k is a constant and x=4 when y=2 then find x when y=-6 What does the : between the factor mean? (2x-3) : (y+4)=k Multi[lication? If so, substitute 4 for x and 2 for y to get (2*4-3):(2+4)=k = 5*6 Then solve for x in (2x-3):(-6+4)=30 If it means ...
*Saturday, October 7, 2006 at 2:22pm by Gina*

**Maths (URGENT)**

At stationary point dy/dx = 0. Hence at any stationary points on the graph of y = 3x^5 - 10x^3 +15x: dy/dx=15x^4-30x^2+15 =0 15(x^4-2x^2+1)=0 (x^4-2x^2+1)=0 The above eq has order of 4 and hence it has 4 roots let x^2=y z^2-2z+1=0 (z-1)^2=0 z=1 y=x^2=1 x=+1or-1 we have to find...
*Thursday, November 12, 2009 at 5:00pm by Anonymous*

**Math**

How would I solve the quadratic equation: 2x^2 + 6x = 0 I would factor out 2x to give 2(x+3)=0 2x^2 = -6x; 2x = -6; x = -3. hopefully thts the answer!
*Wednesday, August 15, 2007 at 4:51pm by Sarah*

**ALgerbra 2**

first take out a common factor of 2x so 2x^4 + 16x = 2x(x^3 + 8) now recall the factoring of the sum of cubes: A^3 + B^3 = (A+B)(A^2 - AB + B^2) apply this to the part in brackets.
*Sunday, March 15, 2009 at 10:56pm by Reiny*

**math**

X = -3, X+3 = 0. X=1, X-1 = 0. X=3, X-3 = 0. X=5, X-5 = 0. (X+3)(X-1)(X-3)(X-5)= 0, (X^2+2X-3)(X^2-8X+15) = 0, X^4-8X^3+15X^2+2X^3-16X^2+30X-3X^2+24X-45, Combine like-terms and get: X^4-6X^3-4X^2+54X-45 = 0.
*Tuesday, April 12, 2011 at 11:09am by Henry*

**precalculus/algebra**

I see a common factor of 3x(2x+1)^(-1/2) so we have 3x(2x+1)^(-1/2)[2(2x+1) + x] = 3x(2x+1)^(-1/2)(5x+2)
*Sunday, June 13, 2010 at 11:12am by Reiny*

**algebra**

so you mean 9^(2x) + 9x + 2 ? if so, .... let 9^x = y then your expression becomes y^2 + y + 2 which does not factor, so the original does not factor.
*Tuesday, January 11, 2011 at 8:48pm by Reiny*

**algebra**

-15(3+x)=-6x-9 -45-15x=-6x-9 -45-15x+15x=-6x+-15x-9 -45=21x-9 -45=x-9 -45/9=5 x=5 is this right
*Wednesday, September 7, 2011 at 12:23pm by babygirl*

**Math please check answer**

Please check my answer thanks :) Find the equation of 9 (2x-18)=36 9(2x)-9 (18) =36 18-162 =36 18-162 =36 18x162 =36 +162 +162 ------------------------- 18x =198 18x 198 ----------- 18 =18 x =11
*Monday, January 7, 2008 at 6:24pm by keleb*

**Math please check answer**

Please check my answer thanks :) Find the equation of 9 (2x-18)=36 9(2x)-9 (18) =36 18-162 =36 18-162 =36 18x162 =36 +162 +162 ------------------------- 18x =198 18x 198 ----------- 18 =18 x =11
*Monday, January 7, 2008 at 6:24pm by keleb*

**math**

11. Y = (1/2)x^2 + 2x - 3 Use Quadratic Formula and get: X = 1.16228, and -5.16228. 27. 3x^2-5x = -3x^2+6 3x^2+3x^2-5x = 6 6x^2 - 5x - 6 = 0 Use the AC method of factoring: A.C = 6*(-6) = -36 = 3*(-12)=4*(-9). Choose the pair of factors whose sum = B or -5: We choose 4, and -9...
*Friday, March 7, 2014 at 5:11pm by Henry *

**Algebra**

Divide: (-8y^7x+15y^7x^6)/(-2y^2x^5) I got y^5(-8+15x^5)/-2x^4 It won't let me add parens. in the answer any suggestions. It does say simplify your answer as much as possible.
*Saturday, February 5, 2011 at 2:35pm by Lisa*

**calculus**

after x hours, the distance y between the ships is y^2 = (10+15x)^2 + (15x)^2 at 3 pm, x=3, so y^2 = 55^2 + 45^2 y = √5050 = 71.06 2y dy/dt = 2(10+15x)(15) + 2(15x)(15) = 300(3x+1) when x=3, 2(71.06) dy/dt = 3000 dy/dt = 3000/142.12 = 21.11 knots
*Sunday, November 4, 2012 at 11:26pm by Steve*

**Algebra....HELP!!**

Factor x^2 + 5x + 6 C = 6 = 1*6 = 2*3. Select the pair of factors whose sum equals B which is 5. We select 2 and 3, because their sum = 5. Solution: (x+2)(x+3). The solution can be checked by performing the multiplication and combining like-terms. Factor 2x^2 + 11x + 12. This ...
*Thursday, October 4, 2012 at 12:52pm by Henry*

**Algebra**

Solve the equation 3/x^2+15x+56 = 2x/x-7 - x/x-8
*Friday, April 2, 2010 at 6:37pm by Please Help*

**alg and trig**

6x^3-5x^2+15x+5 / 2x^2-x+3
*Wednesday, February 2, 2011 at 9:29pm by Katie*

**Algebra 2 help!**

-2x^{2}+15x+25+{63}{x-3}
*Monday, January 13, 2014 at 3:44pm by Ivory Wright*

Pages: <<Prev | 1 | 2 | **3** | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>