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.