SOLUTION: A coffee merchant combines coffee costing $4.50 per pound with coffee costing $3.50 per pound. How many pounds of each should be used to make 40 lb of a blend costing $3.80 per pou

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Question 460782: A coffee merchant combines coffee costing $4.50 per pound with coffee costing $3.50 per pound. How many pounds of each should be used to make 40 lb of a blend costing $3.80 per pound?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
40x3.80=152
m+n=40
4.50m+3.50n=152
3.50m+3.50n=140
m=12
n=28
You need 12 lbs of $4.50 coffee and 28 lbs. of $3.50 coffee for your mixture..