How can you use unit rates to make comparisons

Write two subtraction equations that are equivalent to 5 + 12 = 17.

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9