Can one of you please help me!! It’s writing systems from tables and graphs practice.

Can someone explain to me how to do

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.

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.