Math tutors charges $21 per hour for tutors. the tutors are paid $12 per hour. if math tutors has
30 tutors, each working a 30-hour week, how much profit did the company make last week?

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.