Question

Louise measured the perimeter of her rectangular scrapbook to be 138 cm. If the scrapbook is 39 cm wide, how long is the scrapbook?​

Answer 1

The scrap book is 32 centimeters! Work: The scrapbook is rectangular so the perimeter is
2(+W)
P = 2(+W)
We know the perimeter is 154 and the width is 45
Substituting these values into the equation
154 = 2 (I+45)
Divide each side by 2
154/2 = 2/2 (I+45)
77=1+45
Subtract 45 from each side
77-45 = 1+45-45
32=1
The length is 32 cm