Problema Solution
Beth received grades of 97%, 82%, 89%, and 99% on her first four algebra tests. To earn an A in the course, she needs an average id at least 90%. What score can she receive in the fifth test to earn an A?
Answer provided by our tutors
Let 'x' represent the score on her fifth test.
The average of the 5 tests should be at least 90% means:
(1/5)(97 + 82 + 89 + 99 + x) >= 90
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click here to see the inequality solved for x
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x >= 83%
She needs at least 83% on her fifth test to earn an A.