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OpenStudy (anonymous):
help plzzzz Skylar's grades on four math tests are 85, 78, 77, and 69. What does Skylar need to score on the next test in order to have a mean score of 80? 83 90 91
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OpenStudy (here_to_help15):
It is 91 Here are the steps: Add all the #s together and divide by the numbers there are.I just plugged in 91.
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