Answer:
The answer is: 8a + 5b - 9
Before we get started, it is good to remember PEMDAS - the acronym that tells you the order to carry out equations.
P = parentheses
E = exponents
M = multiplication
D = division
A = addition
S = subtraction
Knowing this, we should start by doing the equations <em>within </em>each parentheses.

So we did the addition and subtraction pieces within each group leaving us with the above equation. Now let's multiply:

20 is the answer.
Answer:
$2.75
Step-by-step explanation:
You would divide the total (13.75) by the amount of crayons he got (5 packs) and you get your answer.