Question

Going into the final exam, which will count as two tests, Brooke has test scores of 79, 82, 74, 59, and 96. What score

does Brooke need on the final in order to have an average score of 80?
Brooke needs a score of
....

Answer 1

Let the score she needs be x.

`(79+82+74+59+96+2x)/(7)=80 \\ \\ 79+82+74+59+96+2x=560 \\ \\ 2x=170 \\ \\ \boxed{x=85}`