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OpenStudy (anonymous):
Your grades on four math tests are 97, 88, 79 and 92. What grade do you eed on the fifth test to reach an average of 90? What method would I use to solve this?
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OpenStudy (anonymous):
97+88+79+92+X/5=90 450=97+88+79+92+X 450=356+X 94=X
OpenStudy (anonymous):
wow thank you!!
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