Problema Solution
Pepperidge farm goldfish is a snack food for which 40% of its calories come from fat. Rold gold pretzels receive 9% of their calories from fat.
How many grams of each would be needed to make 620 grams of a snack mix for which 15% of the calories are from fat.
Answer provided by our tutors
Let x = grams of goldfish
then
620-x = grams of roll gold
.40x + .09(620-x) = .15(620)
.40x + 55.8 - .09x = 93
.40x + 55.8 - .09x = 93
.31x + 55.8 = 93
.31x = 37.2 x = 120
grams of goldfish roll gold: 620-x = 620-120 = 500 grams of roll gold