On Friday, 280 Fry Middle School students purchased pizza in the cafeteria. Thirty-nine percent purchased pepperoni pizza, 26% purchased hamburger pizza, and the rest purchased cheese pizza. How many students bought cheese pizza?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Which expression gives the exact value of x?

Solve the following: 12(x^2–x–1)+13(x^2–x–1)=25(x^2–x–1) 364x–64x=300x