Somebody help me plss

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

The verbal translation for the difference of m and 7 increased by 15

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