Brand X costs $1.65 for 11 ounces. Brand Y costs 2 cents more per ounce. What is the cost of 15 ounces of brand Y?

$2.55

First, we must find out the price for each ounce for Brand X by dividing 1.65 and 11. By doing this, we find out that each ounce costs $.15 (15 cents). If Brand Y costs 2 cents more than Brand X, we can add that to the $.15 of Brand X. This means that Brand Y costs $.17 (17 cents). Now, we must figure out how much money 15 ounces would cost by multiplying 15 and .17, which would equal 2.55. This is total cost of 15 ounces with Brand Y.