Question

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?

Answer 1

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.