Problema Solution
claire has received scores of 85 88 87 and 95 on her algebra test what score must she make to have receive on her fifth test to have and overall test score average of at least 90
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let 'x' be the score on Claire's fifth test
the average of 85, 88, 87, 95 and x is at least 90
(85 + 88 + 87 + 95 + x)/5 >= 90
by solving we find
x >= 95
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The score on Claire's fifth test must be at least 95.