mattosmiriah5533
01.09.2019 •
Mathematics
Rachel was an 85 average after four test. what does she need to earn on the next test if she wants to raise her average to exactly 88?
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Ответ:
she took four tests with one more to take totals 5 tests
88 x 5 = 440
all her tests need to equal at least 440 to get an 88 average
since she has 85 average after 4, 85*4 = 340, so her 4 tests so far have equaled 340
440-340 = 100
she will need to get a 100 on her 5th test to have an 88 average
Ответ: