The correct answer to your question is number 2
The first relation gives two y-values for any given x-value (except x=6).
y² +x = 6 . . . . . is not a function
Well, we just need to perform the operations:
- Multiplication:

- Subtraction:

- Addition:

- Division:

So, if you add all the numbers together you get

Or, if you prefer,

Answer:
88 Tickets were sold
Step-by-step explanation:
20*$4=$80
$216-$80=$136
$136/2=68
20+68=88 tickets