SOLUTION: Cathy scored 76, 84, and 78 on three tests. How much must she score on the next test to have at least an 80 average?
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Question 721522: Cathy scored 76, 84, and 78 on three tests. How much must she score on the next test to have at least an 80 average?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
(76+84+78+x)/4=80
238+x=80*4
238+x=320
x=320-238
x=82
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