You buy a container of cat litter for $13.75 and a bag of cat food for xx dollars. the total purchase is $20.80, which includes 4% sales tax. write and solve an equation to find the cost of the cat food.

An isosceles trapezoid with a perimeter of 42 inches. each of the congruent non parallel sides is 5 inches long, and the trapezoid is 3 inches tall. how long are the two parallel sides? a. 10 in, 22 in b. 16 in, 16 in c. 10 in, 16 in d. 12 in, 20 in