P2 - 5p = 0 solve the equation

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.

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?