SOLUTION: A coffee merchant combines coffee costing $3.50 per pound with coffee costing $3.00 per pound. How many pounds of each should be used to make 40 lb of a blend costing $3.20 per pou

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Question 985298: A coffee merchant combines coffee costing $3.50 per pound with coffee costing $3.00 per pound. How many pounds of each should be used to make 40 lb of a blend costing $3.20 per pound?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Treat the price as a concentration. The coffees are like materials containing dollars for concentrations of some amount of DOLLARS per POUND.

This work shows the concept and method:
Two-part mixture using just a single variable