Timothy is hiking up a mountain. He hikes 0.25 of a mile in 0.3 hours. What is his hiking speed in miles per hour?

The solution set for 5v2 – 125 = 0 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

Someone me! if you’re smart you can solve this!