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thebrain78667:
Marissa has taken four 100-point tests in math this semester. Her mean score is 89%. How may points has she scored altogether on the four tests?
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Vocaloid:
average = points earned/total points available she has an average of 89% on four tests worth 100 points each, for a total of 400 available points so 0.89 = points earned/400 solve for points earned
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