Solve the problem.The manager of a coffee shop has one type of coffee that sells for $7 per pound and another type that sells for $14 per pound. The manager wishes to mix 90 pounds of the $14 coffee to get a mixture that will sell for $10 per pound. How many pounds of the $7 coffee should be used?

A. 120 lb
B. 210 lb
C. 60 lb
D. 105 lb


Answer: A

Mathematics

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