Brooke earns $7 an hour at her job now. she can represent the total she makes in a week using the expression 7r. brooke has asked for a $1 an hour raise. which expressing would represent the amount brooke would make in a week after the raise?

We have that with the increase made Brooke now earns the following amount per hour:
 (7 + 1) = 8 $ / h
 Therefore we must now rewrite the weekly expression of your earnings.
 Rewriting we have:
 (7 + 1) r =
 8r
 
 the amount Brooke would make in a week after the raise is:
 8r