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Maths-

SAT

Easy

Question

Crawford County, Iowa, is shaped like a rectangle. The length of the county is 6 miles longer than the width of the county. If A(x) is the area of the county, in square miles, and x is the width, in miles, which equation best models the area of the county?

A(x) = x(6x)
A(x) = x(6 - x)
A(x) = x(x - 6)
A(x) = x(x + 6)

The correct answer is: A(x) = x(x + 6)

We know that it is a rectangle and the length of the country is 6 miles longer than the with of the country.
Assume that the width = x
So, length = 6 + x
A(x) = x(x + 6)

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