I need help with this question on my math test

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

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.

How can writing phrases as algebraic expressions you solve problems?