Omg plz help im litterly have so meny due assiments

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 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.

Which expression is modeled by this set of arrows on the number line?