Risa is sewing a ribbon around the sides of a square blanket. each side of the blanket is 72 inches long. how many inches of ribbon will risa need?

Risa need 72 inch of ribbon.
To answer this question you just need to find how long the blanket perimeter. The blanket is a square with 72 inch length. To count the perimeter of a square you need to multiply the length with 4. Then the square would be : 4x 72 inch= 288 inch.

Xis equal to three