SOLUTION: Derek scores 100 and 60 on his first two exams.what must he score for a minimum average of 70.write an inequality an solve

Question 1009317: Derek scores 100 and 60 on his first two exams.what must he score for a minimum average of 70.write an inequality an solve
Found 2 solutions by stanbon, fractalier:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Derek scores 100 and 60 on his first two exams.what must he score for a minimum average of 70.write an inequality an solve
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(100 + 60 + x)/3 >= 70
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160+x >= 210
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x >= 50
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Cheers,
Stan H.
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Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Call his third test score, x. Then we write
(100 + 60 + x)/3 >= 70
(160 + x) / 3 >= 70
160 + x >= 210
x >= 50
He must score at least 50.
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