Stage 1
Stage 2
Stage 3
o (x+2)(x+2)
(x+O)(x+3)
(x+2)(x+3)
(x+4)(x+2)

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

9x

x = 3 ± √(5+y)