What is the product 6i(2-4i) in the form a+bi?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

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.