Robert mixes yellow and blue paint in the ratio of 3:2 .If he used 12 gallons of yellow paint, how many gallons of blue paint would he use?

Barrett is comparing the membership fees for two museums. the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?