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?

  1. A(x) = x(6x)
  2. A(x) = x(6 - x)
  3. A(x) = x(x - 6)
  4. 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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