The first one is the correct answer
There is the graphing method, completing the square, factoring, and my favorite, the quadratic formula
$36/n because since there are n amount of tickets, you should divide $36 by n. I feel like you won't get me. For instance, let's say n is 6 tickets. So if 6 tickets are for $36, you should divide $36 by 6 tickets to find the unit rate. Hope this helps.
The mean is the average where u add up all the numbers and the. divide by the median