Rashal is adding the expression below. Negative 3 + left-bracket (negative 7) + (negative 6) right-bracket

First, he rewrites the expression.

Left-bracket negative 3 + (negative 7) right-bracket + (negative 6)

Which number property did Rashal use to rewrite the expression?
associative property
commutative property
distributive property
identity property

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