Can someone solve and explain this this is due by 1:00 pm est so no rush

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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.

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way