Can you guys pls help i’m so confused

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Mama mia restaurant used 1 2 2 1 ? of their mozzarella cheese making pizza and the remaining 6 4 64 ounces making pasta. how many pounds of mozzarella cheese did mama mia start with?

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd