At the library, Erin found 6 books of interest but he can only borrow 4 books. How many possible selections can he make?

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

Can someone me out here and the tell me the greatest common factor

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal