I need help with both questions...

I got a for 17 and c for 18 but I’m unsure if those answers are correct due to the table being a part of the question.

I’m offering 30pts

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8