To cover a rectangle region of her yard, Penny needs at least 170.5 square feet of sod. The length of the region is 15.5 feet. What are the possible widths of the region?

We know that the perimeter of a rectangle is 2 (width) + 2 (length). We can multiply the length by 2 to find out how much remaining fencing we have, then divide that number by 2 to find the width.

15.5*2=31

170.5-31=139.5

139.5/2=69.75

A possible width is 69.75 feet.