Write a function rule for the area of a rectangle with a length of 2 ft less than three times its width. What is the area of the rectangle when it's width is 2 ft.

Question

Mathematics

Tristin Mccarthy

29 November, 12:38

Write a function rule for the area of a rectangle with a length of 2 ft less than three times its width. What is the area of the rectangle when it's width is 2 ft.

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Madalynn Oconnor · Answer 1

Let width = x, then length = 3x - 2.

So we have area = width * length = x * (3x + 2)

A = 3x² + 2x

Now we need to find A (2) = 3 * 2² + 2 * 2 = 16ft²