Question

PROBLEM SOLVING

The area of a door is given by the expression 7x- 14. The door's length is 7 feet.
7. Write an expression to represent the 8. Evaluate your expression for for x = 6,
width of the door.
to find the door's actual width.
9. Find the area of the door.
10. Find the perimeter of the door.

Answer 1

see below

Explanation:

area of a door = length * width = 7* width = 7x-14

so width = ( 7x-14 ) / 7 = x-2

when x=6 width = 4

area = 4*7 = 28

perimeter = (4+7)*2 = 22