The product of and the sum of a number and - 4 is less than or equal to 64. What are all the possible values of the number? Show your work.

pls help

What is the result of the following division?

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.

Which one is the correct answer, and why?