11 POINTS FOR YOU!!! Math wizzes please :)

2. 6(15-10) = 6(5) = 30
4. |-7|-|7| = 7-7 = 0
24. " less than or equal to"
27. -3<.5<2

Everything else looks fine.

1. correct
2. the answer is 30, BEDMAS
3. correct
4. correct

22. correct
23. correct
24. seven is less than or equal to the quotient of a and 9
25. correct
27. correct

1. Correct.

2. Wrong-It should be 30. How did you get 10? Apply BODMAS correctly.

3.Correct asssuming the brackets are placed correctly.
. I hope we could use exponential notations on Yahoo! Answers. But what I understand of it:
6^2-2*3^2= 36-18=18

4.Is that mod(-7)-mod(7)
If it is, then it is 0. Not 14.

22. Correct
23. Correct

24. Are you tryng to say the less than equal to sign? If not then I think what you are trying to express in your words is correct. Otherwise it will be 7 less than-equal to a over 9

25. Correct.
26. Wrong. -3<0.5<2 (negative 3!)
You can rearrange the order and change symbols accordingly.

Hope this helps.