SOLUTION: Joe scored 85, 89, 86, and 93 on the first 4 testsin math. what must he score to average 90

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Question 770422: Joe scored 85, 89, 86, and 93 on the first 4 testsin math. what must he score to average 90
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
if you mean that he will take one more test, and all the tests have the same weight then...
(85+89+86+93+x)/5=90
x+353=450
x= 97