Someone plzzz help me

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

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total