SOLUTION: On his last 3 math tests, Mark scored 85,95 and 80. what grade must he get on his next test to have an average of 90 for all four tests?
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Question 347595: On his last 3 math tests, Mark scored 85,95 and 80. what grade must he get on his next test to have an average of 90 for all four tests? Answer by Fombitz(32388) (Show Source):
