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OpenStudy (anonymous):
exam 1...80 exam 2...90 exam 3...50 exam 4 ? Hillary needs an average score of 70 on four exams in order to receive a passing grade in her math course. If the results of her first three tests are shown in the graph above, what is the minimum grade Hillary must earn on her fourth and final exam in order to pass the course?
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OpenStudy (hba):
Solve for x. \[\frac{ 80+90+50+x }{ 4 }=70\]
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