Paolo is putting a fence around his pool. The length of the pool is 20 feet, the width is open paren 20 minus x close paren feet, and the area of the pool is 300 square feet. Recall that area is length multiplied by width. The equation models the area of the pool. 20 times open paren 20 minus x close paren is equal to 300 What is the value of x ? Round to the units place.
Use the given area equation: 20(20 − x) = 300. Divide both sides by 20 to get 20 − x = 15, so x = 5. The value of x is 5, which is choice A.
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