The width of backyard is 45 feet.
Step-by-step explanation:
Given,
Length of backyard = 120 feet
Perimeter of backyard = 330 feet
Width of backyard = w
Perimeter = 2(Length + Width)
[tex]330=2(120+w)\\330=240+2w\\330-240=2w\\90=2w\\2w=90[/tex]
Dividing both sides by 2
[tex]\frac{2w}{2}=\frac{90}{2}\\w=45[/tex]
The width of backyard is 45 feet.
Keywords: perimeter, division
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