Answer: Let's start by using algebra to solve the problem.
Let's call the width of the rectangle "w". Then we know that the length of the rectangle is twice the width, or "2w".
The formula for the perimeter of a rectangle is:
P = 2l + 2w
where P is the perimeter, l is the length, and w is the width.
We know that the perimeter is 18 inches, so we can substitute the values we have:
18 = 2(2w) + 2w
Simplifying:
18 = 4w + 2w
18 = 6w
Dividing both sides by 6:
w = 3
So the width of the rectangle is 3 inches.
To find the length, we can use the fact that it is twice the width:
l = 2w = 2(3) = 6
So the length of the rectangle is 6 inches.
Therefore, the rectangle is 6 inches long and 3 inches wide.
enjoy!