Blank choices
4, 8.5, 0, 7.5, 40
6, 5, 4, 0, 16
2.5, 5, 0, 1
2, 4, 0, -4

heell correct answer gets

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.