Posted by **Eve** on Sunday, August 31, 2008 at 6:37pm.

Hello. It's the beginning of the school year, and I've quite forgotten what I learned in Pre-Algebra...The question in the text book is this :

Simplify each pair of expressions.

1. 36 - 8 ÷ 2

(36 - 8) ÷ 2

There are several problems like the one above. Under the same set of directions, though, some problems look like this :

7. 3(9+2) - 8

__________

7

With only one problem.

So, what am I supposed to do?

- Algebra -
**Eve**, Sunday, August 31, 2008 at 6:42pm
And, once that's answered, the next set of directions don't make sense to me either.

Evaluate each expression for a = 3, b= 7, c = 4.

13. a(2b-c)

?

Does evaluate just mean...Answer?

- Algebra -
**Eve**, Sunday, August 31, 2008 at 6:57pm
I believe that I understand the directions, now. Thank you though. It'd odd - Jiskha homework help used to work so much more quickly, in past years. I wonder what happened. Anyways, thanks again, and good luck with the other questions.

- Algebra -
**bobpursley**, Sunday, August 31, 2008 at 7:29pm
Under the first two, do the operations in the correct order: Parentheisis, multiply, divide, add subtrract.

So on the first

36 - 8 ÷ 2, do the divide first:

36-4 then the subtract.

This will be a quite a different answer from the second.

Yes, on the last, it means evaluate.

- Algebra -
**Eve**, Monday, September 1, 2008 at 1:05pm
Alright. I apologize for my rudeness. Thank you.

- Algebra -
**misty**, Tuesday, November 29, 2011 at 4:46pm
15- n when n=9

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