The length of a rectangle is represented by....

Question

The length of a rectangle is represented by the function L(x) = 4x. The width of that same rectangle is represented by the function W(x) = 7x² - 4x + 2. Which of the following shows the area of the rectangle in terms of x? 

 

A. (L + W)(x) = 7x² + 2

B. (L + W)(x) = 7x² -8x + 2

C. (L • W) (x) = 28x³ - 16x² + 8x

D. (L • W)(x) = 28x³ - 4x + 2

Answer 1

Area of a rectangle = length x width

A = 4x(7x² - 4x + 2) = 28x³ - 16x² + 8x

 

The correct choice is C.