SOLUTION: Dave earned the following test scores in his biology class: 82, 88, 92, and 93. How high does he have to score on the fifth test to have an average of 90 or more?

SOLUTION: Dave earned the following test scores in his biology class: 82, 88, 92, and 93. How high does he have to score on the fifth test to have an average of 90 or more?

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Question 1137088: Dave earned the following test scores in his
biology class: 82, 88, 92, and 93. How high does he have to score on the fifth test to have an average of 90 or more?
Answer by ikleyn(52832) (Show Source): You can put this solution on YOUR website!
.

 >= 90


82 + 88 + 92 + 93 + x >= 90*5 = 450


355 + x >= 450


x >= 450 - 355 = 95.


Answer.  x >= 95:   more than ot equal to 95.

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