SOLUTION: Mike needs at least a 75% average to pass his math course. The class contains 5 exams that are equally weighted. If he scored a 64%, 86%, 71%, and 90% on the first 4 tests, what

Question 835403: Mike needs at least a 75% average to pass his math course. The class contains 5 exams that are equally weighted. If he scored a 64%, 86%, 71%, and 90% on the first 4 tests, what score does he need on the final test to earn at least a 75% in the class
Answer by LinnW(1048) (Show Source): You can put this solution on YOUR website!
First find the grade on the test that will produce an average
grade of 75.
Set x = the grade on the 5th test.

multiply each side by 5

add -311 to each side

So a grade of 64 produces an average of 75
and a grade of 64 or above will produce
an average greater than or equal to 75
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