SOLUTION: a student scored 71, 83, and 96 on three algebra tests. what must he score on the fourth test in order to have an average of at least 85?

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Question 517973: a student scored 71, 83, and 96 on three algebra tests. what must he score on the fourth test in order to have an average of at least 85?
Answer by solver91311(24713) About Me  (Show Source):
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If you want an average of 85 on 4 tests, then the sum of the test scores must be 4 times 85. Subtract the sum of the test scores you already have from the product 4 times 85.

John

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