(2, -4) , (3, 2) , (-1, 0) , (2, 5) , (0, 4) is it a function

Find the value of x that will make l ll m

Negative 5 1/12 + negative 4 1/4 + 6 3/4

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.