Gillian bought 3 packages of cat food and 2 packages of dog food each package of cat food contained 7 cans, and each package of dog food contained 3 cans. how many more of cat food than dog food did gillian buy

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?