John and 4 friends are going out for pizza for lunch. they split one pizza and 5 large drinks. the pizza cost $12.00. after using a $5.00 gift certificate, they spend a total of $14.25. write an equation to model this situation, and find the cost of one large drink.

John + 4 friends is a total of 5 people

5 people = 5 drinks 1 pizza

5 people = 5 drinks + 12$

5people = 5 drinks + 12$ -5$

5 people = drinks + 7$

5 people = 7.25$ for drinks + 7 for pizza

7.25 for 5 drinks = 1.45

1 drink = 1.45

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8