Which expression is equivalent to?

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

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer