The length of a rectangle is 5 m less than twice the width, and the area of the rectangle is # 33 m^2#. What are the dimensions of the rectangle?
2 Answers
Length
Width
Explanation:
Let
Then the length is:
Area is length x width:
Factor:
Dimensions of rectangle:
Length
Width
Explanation:
We can start by listing what we know and what we don't know.
#l = 2w - 5# #a = 33# #w = ?# #a = lw#
We know that if A = B and A = C, then B must equal C. We can use this basic logical principle to write ourselves an equation that we can use to find the solution.
if
We can then use the same principle to simplify this equation so that it uses only one variable. If
After that, you need to simplify, factor, and evaluate:
It is impossible for a rectangle to have a width of -3 meters, so we can eliminate that option. Now we know that our width is 5.5 meters.
Now we can plug the width into our length equation to find the length.
To check our answers, we can plug our length and width back into our