Determine whether 18 is a solution of the equation x+12=36

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?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

Plzzz answer both questions and i will give you 100 points