-2x-y=-5 In slope intercept form please! :)

Which statement best describes the polynomial

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

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