Write an expression for the perimeter in terms of x.
The perimeter is all of the sides added together, or 2l + 2w.
Assuming the perimeter is 78 cm, determine the dimensions of the rectangle. Show all of your work.
6x + 6 = 78
6x = 72
Solve for x and then substitute for the x in the expressions for the length and the width.
Verify that the area of this rectangle is 360 sq. cm. Explain how you know this.
In part (b), You found x. Now find the length and width.
The area is equal to the length times the width.