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The length of a rectangle is 6 yards more than twice the width. The area of the rectangle is 36 𝑦𝑑2. Find the length.Responses3 yards3 yards8 yards8 yards12 yards12 yards18 yards

Question

The length of a rectangle is 6 yards more than twice the width. The area of the rectangle is 36 𝑦𝑑2. Find the length.Responses3 yards3 yards8 yards8 yards12 yards12 yards18 yards

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Solution

Let's denote the width of the rectangle as x (in yards). According to the problem, the length of the rectangle is 6 yards more than twice the width, so we can express the length as 2x + 6.

The area of a rectangle is given by the formula: Area = length * width. In this case, the area is 36 square yards. So we can set up the equation:

36 = (2x + 6) * x

Solving this equation will give us the value of x (the width), and substituting x into the expression for the length will give us the length of the rectangle.

Let's solve the equation:

36 = 2x^2 + 6x 0 = 2x^2 + 6x - 36

Divide the entire equation by 2 to simplify:

0 = x^2 + 3x - 18

This is a quadratic equation in the form ax^2 + bx + c = 0. We can solve it by factoring:

0 = (x - 3)(x + 6)

Setting each factor equal to zero gives the solutions x = 3 and x = -6. Since a width can't be negative, we discard x = -6.

So, the width of the rectangle is 3 yards.

Substitute x = 3 into the expression for the length:

Length = 2(3) + 6 = 12 yards.

So, the length of the rectangle is 12 yards.

This problem has been solved

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