What is the scale factor for the similar figures?

For the equation below, x is the input and y is the output. y = -4x + 3 if the input is -8, then the output is

In the 30-60-90 triangle below side s has a length of and side r has a length

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