The length of a rectangle is 3 less than twice the width. If the perimeter is 18 cm, what is the area? Show your work and solve using either substitution or elimination.

Question

asked May 3, 2022 195k views

1 Answer

Siu Chung Chan · Answer 1 · 2022-05-07T07:27:06+0000

Answer:

Step-by-step explanation:

1) "The length of a rectangle is three more than twice the width." This can be written in a math sentence as

L = 2W + 3

where "twice the width" is 2W and "three more" is just adding 3.

2) "Perimeter is 36 inches". Recall the formula for the perimeter of a rectangle

P = 2W + 2L

set the formula to 36 and that gives us our second equation: 36 = 2W + L

then use substitution do solve