There are 120 students going in a field trip. If each bus held 30 students, how many buses are needed? A:6
B:5
C:4
D:3

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39