Homework Help: Mathematics

Posted by Devki on Thursday, August 7, 2008 at 3:35pm.

Hello, I am new to this website. I havea summer assignment on Algebra II. I need help on these problems. I find I be not able to understand them.

Simplify:
1)(mn^2/3)(4/mn)
2)(x+4/x-4)(1/x+4)
3)(x^2-16/2x+8)(x+4/x^2+8x+16)
4)(n/4)(n/m)
5)(3a^3-27a/2a^2+13a-7)(9a^2/4a^2-1)

Mathematics - Damon, Thursday, August 7, 2008 at 3:44pm
Well, I will do one of them, then you try the rest and post your work. One of us will try to help if we see where you are running into trouble.

3)(x^2-16/2x+8)(x+4/x^2+8x+16)

[(x-4)(x+4) / 2(x+4 )][(x+4)/[(x+4)(x+4]]

[(x-4)/2)][1/(x+4)]

(x-4)/(2x+8)
- Mathematics - Devki, Thursday, August 7, 2008 at 4:17pm
  Thank you!
  
  Is this right?
  
  (mn^2/3)(4/mn)
  [(mn)(mn)/3] * [4/mn]
  
  (mn/3)(4)
  
  ANSWER: 4mn/3
Mathematics - Damon, Thursday, August 7, 2008 at 4:21pm
I do not think m is supposed to be squared the way you typed it, only n
(m n n /3) (4 / m n)
4 n / 3

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