Tessa designs a supply closet as an addition to her house. The closet is pictured, and its total area is 36 square feet. What is the length in feet of the side of the supply closet labeled with the question mark? (1 point)
The area of a rectangle is given by the formula length x width. Let's call the length of the supply closet x feet. Since the total area is 36 square feet, we can set up the equation:
x * 9 = 36
Solving for x:
x = 36 / 9
x = 4
Therefore, the length of the side of the supply closet labeled with the question mark is 4 feet.