Question

25 Points.

The function f(x) = 4x + 3 represents the length of a rectangle. The function g(x) = 2x − 5 represents the width of the rectangle. Use (f • g)(4) to determine the area of the rectangle.

57

19

16

3

Answer 1

Answer:

57

Step-by-step explanation:

(f•g)(x) = f(x)•g(x)

= (4x+3)(2x-5)

= 8x²-20x+6x-15

= 8x²-14x-15

(f•g)(4) = [4(4)+3] [2(4)-5]

= (16+3)(8-5)

= 19 • 3

= 57

Answer 2

Answer:

57

Step-by-step explanation:

got it correct on test. :)