What are the coefficients in the algebraic expression

Which of the following expressions is equal to 2x^2+8

What is the value of x in the following equation. -x ^3/2 = -27

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.