SOLUTION: Jason has grades of 89 and 87 .what grades must he earn on his next test to get an average of 90 for the three tests

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Question 954543: Jason has grades of 89 and 87 .what grades must he earn on his next test to get an average of 90 for the three tests
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
To average 90 on three tests, the sum of the grades must be 3(90)=270
The sum of 89 and 87 is 176 so to average 90, he must score 270-176=94
ANSWER: He must score 94 on the third test to average 90 on the three tests.