Answer:
The expression for the perimeter of the rectangle is: [tex]P = 4x - 18[/tex]
Step-by-step explanation:
Perimeter of a rectangle:
A rectangle has length l and width w. It's perimeter is given by:
[tex]P = 2(l + w)[/tex]
In this question:
[tex]l = x - 9, w = x[/tex]
So
[tex]P = 2(x - 9 + x) = 2(2x - 9) = 4x - 18[/tex]
The expression for the perimeter of the rectangle is: [tex]P = 4x - 18[/tex]
