Question

The function f(x) = x + 5 represents the length of a rectangle, and the function g(x) = 7x − 2 represents the width of the rectangle. What is the area of the rectangle if x = 3? 56 27 285 152

Answer 1

Answer: 152

Explanation:

Length: f(x) = x+5

Width: g(x) = 7x-2

Area: A= f(x) *g(x)

A= (x+5)(7x-2)

= 7x^2 -2x + 35x -10

= 7x^2 +33x -10 // Substitute 3 in for x

=7(3)^2 +33(3) -10

=7(9) +99 -10

=63+99-10

=152