Question

The length of a rectangle is 9 centimeters less than four times its width. Its area is 28 square centimeters. Find the dimensions of the rectangle.

Answer 1

For this one it is best to start out drawing the rectangle, in my opinion, so you can see what it is you are looking at. We need to make a substitution for the length so the equation we have is in only one unknown instead of 2.

Answer 2

Do you see how that is done? Now we will label a rectangle in terms of width only. Like this:

Answer 3

Do you the area formula for a rectangle?

Answer 4

No

Answer 5

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