Question

5. A rectangular vegetable

garden has a width of
4 feet and a perimeter
of 18 feet. What is the
length of the vegetable
garden (in feet)?

Answer 1

First let’s define our variables

P= perimeter
L = length
W= width

And then with the formula for the perimeter of our rectangle

P = 2L+ 2W

We then can substitute what we do know that; P=18 and the W=4

18 = 2L+ 2(4)

Then solve by isolating the variable

18 = 2L+8
18-8 = 2L +8-8
10 = 2L
10/2 = 2L/2
L = 5

So our length is equal to 5 feet.