Algebra
posted by Alexandria
Can someone check my algebra answers and help me with the problems I don't understand?
1. n^2n20/2n^2 times n^2+5n/n^225
answer: n+4/2n
2. (2x6/21)/(5x15/12)
answer: 8/35
3. 5x3/6  x+3/6
answer: 2x/31
4. 5x/26  2x/13
answer: 1x/26
5. 3x^2/9x^5
answer: 1/3x^3
6. (x^2+2x15/4x^2)/(x^225/2x10...
answer: I'm not to sure but i think its x3/2x^2
7. x+2/x/x2/3x
answer: 3(x+2)/x2
8. What values for x must be excluded in the following fraction?
9/x8
answer: 8
9. x13/x^2x12 + 3x3/x^2x12
answer: 4/x+3
Sometimes it helps to use parentheses when typing these kinds of problems online. From what I can determine, these answers look correct, except for #3. (For #4, you can just state the answer as x/26.)
Here's #3 worked out:
(5x3)/6  (x+3)/6 =
(5x3x3)/6 =
(4x6)/6 =
2(2x3)/6 =
(2x3)/3
I hope this will help.
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