15 point
.
A rectangle has the dimensions shown.
(x) units
(2x + 3) units
Which expression represents the area of this rectangle in square units?
a. 2x2 + 3
b. 2x2 + 3x
k. 3x +2
d. x + 2

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.