Homework Help: Intermediate Algebra

Posted by Richard on Friday, November 3, 2006 at 1:26pm.

Am I going in the right track?

8x -1/x + 5x - 3/2x

= 16x^2 - 2x/2x^2 + 5x^2 - 3x/2x^2

16x^2 - 2x + 5x^2 - 3x/2x^2

=21x^2 - 5/2x^2

Find the LCD

6/7z- 28, 8/x^2 -4x

= 7x(x-4)

Simplify

3x^2 - 2x/15x-10

= x/5

Let's start by looking at your first problem:

8x -1/x + 5x - 3/2x

To simplify, use a common denominator, which is 2x.

16x^2/2x - 2/2x + 10x^2/2x - 3/2x

Now we have:

(16x^2 - 2 + 10x^2 - 3)/2x

Combining like terms in the numerator:

(26x^2 - 5)/2x

And that's as far as we can go on this one.

Is your second problem supposed to be 6/(7x - 28), 8/(x^2 - 4x)?

If so, your LCD is correct!

For your third problem, I'm going to assume it is this:
(3x^2 - 2x)/(15x - 10)

If so, your answer is correct!

If your first problem was this:

(8x - 1)/x + (5x - 3)/2x

...then your answer is close. The common denominator would still be 2x, but the answer would be (21x - 5)/2x instead.

I hope this helps.

No one has answered this question yet.

Answer this Question

Related Questions

Math33333 - Please help me! Problem: x+2 x-3 _________ - _________ 2x^2+5x+2 2x^...
algebra - Reduce answers to lowest terms. 1.) 2x/2x^2+5x-3 + 5/x^2-9 = 2.) x-3/...
Math - Can someone please check my answers below for accurateness? The ...
Algebra 2 - Choose the appropriate simplified expression. 1. 8x^2-10x+3/6x^2+3x-...
Algerbra - how do you solve 7(3x+4)=8(2x+5)+13 expand the parenthesis...I will ...
bobPursley2...the other one - Problem 2: (x+2)/(2x^2+5x+2) - (x-3)/(2x^2-5x-3) ...
Math - Please show the solutions! 1.) x+y-2(2x-3y) 2.) x+y/2 - 3x-y/4 + x-5y/8 3...
Math - find any stationary points of the function g(x) = (2x-3)square root of 5+...
Rational Expression - (x+1/2x-1 - x-1/2x+1) * (2x-1/x - 2x-1/x^2) (x+1/2x-1 - x-...
Algebra 2 - Find the number of times r is a root of P(x)=0. 1. P(x)=x^4+4x^3-16x...

For Further Reading

First Name:
School Subject:
Answer: