Question 284162
 After four geometry tests this nine weeks, Jessica's average score is 88%. What score does she need on her next test in order to raise her average to 90%?
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Points needed to average 90 on the 5 tests: 5*90 = 450
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Points she has on the 1st 4 tests: 4*88 = 352
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Points she needs on the 5th test: 450-352 = 98
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Using an Equation:
(4*88+x)/5 = 90
352+x = 450
x = 98
Cheers,
Stan H.