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OpenStudy (anonymous):
help me plzzzzz 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 (anonymous):
85+78+77+69+n/5 = 80 Does this help?
OpenStudy (anonymous):
yes
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