Use properties of addition and subtraction to evaluate the expression. -19 - 53 - 31 enter your answer in the box.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Afootball is throw by a quarterback to a receiver

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units