Solve using a system of two equations in two unknowns.The manager of a bulk foods establishment sells a trail mix for $7 per pound and premium cashews for $15 per pound. The manager wishes to make a 120-pound 
mixture that will sell for $9 per pound. How many pounds of each should be used?
A. 60 lb of trail mix, 60 lb of cashews
B. 75 lb of trail mix, 45 lb of cashews
C. 90 lb of trail mix, 30 lb of cashews
D. 30 lb of trail mix, 90 lb of cashews
Answer: C
Mathematics
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