Answer:
17/27
Step-by-step explanation:
Let
L----------> <span>the length of the yard
W--------> </span><span>the width l of the yard
we know that
the perimeter is equal to
</span>
![P=2*[W+L]](https://tex.z-dn.net/?f=P%3D2%2A%5BW%2BL%5D)
![72=2*[W+L] \\ 36=W+L](https://tex.z-dn.net/?f=72%3D2%2A%5BW%2BL%5D%20%5C%5C%2036%3DW%2BL)
--------> equation 1

------> equation 2
<span>substitute equation 2 in equation 1
</span>



<span>
we know that
Area of the rectangular yard is equal to
</span>

<span>
</span>
36 pairs
because 2 spots = 1 pair
so 2x=72
and your answer will be 36 pairs
subtract like terms
5a^3 - 6a^3 = -a^3
7 - 4 = 3
answer is -a^3 + 2a^2 - 4a + 3