Select the correct answer. What are the zeros of this quadratic function? f(x) = (x − 7)(x + 8) A. x = 0 and x = -8 B. x = 0 and x = 7 C. x = -7 and x = 8 D. x = 7 and x = -8

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.