Write the ratio of 25 cars to 15 cars in lowest terms

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 answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?