Me with this guys, i promise to mark you as a brainest

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.

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters