Question

The length of a rectangle is three centimeters more than twice the width. The perimeter is 78. Use Guess and Check to find out how long and how wide the rectangle is.

Answer 1

 (perimeter of a rectangle) 2w + 2l
l = 2w + 3 (length is 3 more than twice the width)P = 78  Plug in the variable values:78 = 2(2w + 3) + 2w78 = 4w + 6 + 2w78 = 6w + 670= 6w 11.6= w