Is these correct bro

What is the solution to the equation 9^(x+1) =27

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15