Which of the following equations has only one solution?
1. x2-1=0
2. x2+x=0
3. x2+4x+4=0

(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

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4

the answer is z7+8/5