SOLUTION: A student scored 66, 81, and 96 on three algebra tests. What must he score on the fourth test in order to have an average grade of at least 85?

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Question 1168506: A student scored 66, 81, and 96 on three algebra tests. What must he score on the fourth test in order to have an average grade of at least 85?
Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
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%2866+%2B+81+%2B+96+%2B+x%29%2F4 >= 85.


Solve this inequality and find x


66 + 81 + 96 + x = 4*85 = 340


x >= 340 - 66 - 81 - 96 =  97.


ANSWER.  The student' score   must be at least 97 to get the goal.

Solved.

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