SOLUTION: Kerry has 1st, 2nd, and 3rd quarter grades of 83,92 and 88. What does Kerry need to get for her fourth quarter grade so that her overall average is a 90?

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Question 839962: Kerry has 1st, 2nd, and 3rd quarter grades of 83,92 and 88. What does Kerry need to get for her fourth quarter grade so that her overall average is a 90?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(83+92+88+x)/4=90
263+x=90*4
x=360-263
x=97