How much cashews at $1.58 per pound must be mixed with walnuts that cost 78 cents per pound to make a mixture of 40 pounds of nuts that cost $1.50 per pound?
Let the number of pounds of cashews needed=C The number of pounds of walnuts needed=40 - C
1.58C + 0.78[40 - C] =1.50 *40, solve for C C = 36 pounds of cashews 40 - 36 =4 pounds of walnuts
