Someone please help me answer this!!

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

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Sketch one cycle if the cosine function y=2cos2theta