What are the solutions of the quadratic equation below?

2x2 - 2x - 9 = 0

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?

How to do this , and can some one explain

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.