What is the answer for t/6-14=-20 ?

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

What is the measure of the smallest angle in the diagram? 15 29 32 45

Evaluate cos2θ for cosθ = square root of 3/2