SOLUTION: ryans first four test grades are 85 89 87 and 96 what is the lowest grade ryan can get on his next test so that the average of the five test grades will be at least a 90?

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Question 313496: ryans first four test grades are 85 89 87 and 96 what is the lowest grade ryan can get on his next test so that the average of the five test grades will be at least a 90?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let T be Ryan's grade on his next test.
%2885%2B89%2B87%2B96%2BT%29%2F5%3E=90
Now solve for T.