A rectangle has a perimeter of 80 feet. Its height is 5 feet shorter than 4 times its base. What are the dimensions of this rectangle?
1 Answer
Oct 19, 2017
31 feet by 9 feet
Explanation:
Firstly, label the dimensions of the rectangle as variables.
Since the perimeter is 80 feet, all four sides must add up to 80
Let the height
and the base
The perimeter of a rectangle is made up of two of the base lengths and two of the height lengths.
From the second part of the question:
Substituting the expression for
Substituting this found value of