SOLUTION: A student has scores of 83, 89, 78, and 86 on her first four tests. what score must she get on her fifth exam so that the average for all 5 exams is 85 or higher?

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Question 267059: A student has scores of 83, 89, 78, and 86 on her first four tests. what score must she get on her fifth exam so that the average for all 5 exams is 85 or higher?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
83 + 89 + 78 + 86 + x ≥ 5*85

336 + x ≥ 425

x ≥ 89