Question

7) Assume there exists a rectangle with a length of (x + 1) and a width of (x-4). What is the

perimeter of this rectangle?
A) 2x - 3
B) x²-3x - 4
C) 4x - 6
D) 2x + 4

Answer 1

Answer: C

P = 4x-6

Explanation:

( We will use variable P for the perimeter.)

Formulas we need to know

P= 2w+2l

w=(x-4)

l=(x+1)

Plug in for the variables: 2(x+1)+2(x-4)=P

Distribute: 2x+2+2x-8=P

Simplify: 4x-6=P

Looking through the answer choices, we determine it must be option C