Baileys rectangular dog pen for his Irish setter must have an area of 400 square feet. Also, the length must be 10 feet longer than the width. How do you find the dimensions of the pen?
Width = 15.616 feet, length is 25.616 feet.
Start with a sketch of a rectangle. Let
The length is 10 feet longer, so the length is
The area is found from
Make an equation in
Completing the square method probably easiest.