Answer:
4 square yards.
Step-by-step explanation:
Let's break the units down.
[tex]x (ft) * y (ft) = xy (ft^2)\\\\[/tex]
A yard is 3 feet, so:
[tex]\frac{x}{3} (yd) * \frac{x}{3} (yd) = \frac{xy}{3^2} (yd^2) = \frac{xy}{9} (yd^2)[/tex]
The area is [tex]36 (ft^2)[/tex]. The individual dimensions don't matter here.
[tex]36 = xy\\\\\frac{36}{9} (yd^2)=36(ft^2)\\\\4(yd^2)=36(ft^2)[/tex]
So 36 square feet is equal to 4 square yards.