You want to average at least 90% on your algebra quizzes. So far, you have scored 93%,97%,81%,and 89% one your quizzes. What must you score on your next quizz to have at least a 90% average?

1 Answer
Feb 25, 2018

You need to score at least a 90 on your next quiz to have a 90 or above average.

Explanation:

Write an equation that satisfies this:

(93+97+81+89+x)/5=90

Solve:

(360+x)/5=90

360+x=450

x=90

You need to score at least a 90 on your next quiz to have a 90 or above average.