Algebra
posted by Eve on .
Hello. It's the beginning of the school year, and I've quite forgotten what I learned in PreAlgebra...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?

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(2bc)
?
Does evaluate just mean...Answer? 
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.

This is a holiday weekend and many of our tutors are on vacation. Also the new hurricane has driven at least one of them out of his home.

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:
364 then the subtract.
This will be a quite a different answer from the second.
Yes, on the last, it means evaluate. 
Alright. I apologize for my rudeness. Thank you.

15 n when n=9