SOLUTION: What grade would would I need to keep 90 in a class. I have 99 and the final exam counts as 20 percent.

Question 934345: What grade would would I need to keep 90 in a class. I have 99 and the final exam counts as 20 percent.
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
(1 - 0.20)*99 + 0.20x = 90
0.20x = 90 - (1 - 0.20)*99
x = ( 90 - (1 - 0.20)*99 ) / 0.20
x = 54
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get 54 or higher on the final exam
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