Question

A food store makes a 9-lb mixture of peanuts, cashews, and raisins. Peanuts cost $1.50 per pound, Cashews cost $2.00 per pound, and raisins cost $1.00 per pound. The mixture calls for twice as much peanuts then cashews. The total cost of the mixture is $13.00. How much of each ingredient did the store use?

Answer 1

Total pounds of trail mix:
p + c + r = 9

Total cost of trail mix:
1.5p + 2c + p = 13

Amount of mixture
c = 2p

Solve the system