Question

Marshall bought 32 ounces of mixed nuts, which are estimated to be 30% peanuts. Which expression can be used to find the percentage of peanut concentration of the final mix if he adds x ounces of peanuts?
mc012-1.jpg
mc012-2.jpg
mc012-3.jpg
mc012-4.jpg

Answer 1

Initial peanuts = 30% of 32 = 0.3·32 = 9.6 ounces. After adding x ounces of peanuts, peanut amount = 9.6 + x and total weight = 32 + x.

So the peanut percentage is (9.6 + x)/(32 + x) (or as a percent: 100·(9.6 + x)/(32 + x)%). Choose the answer that matches this expression.