Need help with number 5

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

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

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression