The rectangle shown has an ear of 72 square centimeters what is the length of the rectangle

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

We have enough material to build a fence around a station that has a perimeter of 180 feet the width of the rectangular space must be 3 1/4 feet what must the length be

What statement is true? 2x^2-9x+2=-1