Question

find the cost per pound of a coffee - mixture made from 4 lb of coffee that costs $9.90 per pound and 12 lb of coffee that costs $5.10 per pound. dollars per pound

Explanation:

Step1: Calculate total cost of each type of coffee

The cost of 4 - lb coffee at $9.90 per pound is $4\times9.90 = 39.6$ dollars. The cost of 12 - lb coffee at $5.10 per pound is $12\times5.10=61.2$ dollars.

Step2: Calculate total cost of the mixture

The total cost of the mixture is $39.6 + 61.2=100.8$ dollars.

Step3: Calculate total weight of the mixture

The total weight of the mixture is $4 + 12 = 16$ pounds.

Step4: Calculate cost per pound of the mixture

The cost per pound of the mixture is $\frac{100.8}{16}=6.3$ dollars per pound.

Answer:

$6.3$