Can Some one plz have a heart and help me plz :)
There are 3 questions and the imges are below

Shiny white dental insurance costs $258 per year. approximately one-third of insured people need a filling, which averages $110 each. 80% of insured people get a preventive check-up each year, and the average cost of this visit is $95. if you consider shiny white’s income and expenses, what is the expected value of each insured customer?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)