Factor the expression completely
-72x^2-45x

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

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities