90 students went on an activity day. Complete the two-way table. Cycling, swimming and results in fraction. Please help

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.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose