I need the answers edg 2020

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?

Through: (-3,-3) parallel to y= 7/3x+3

If the value of cos330°is√3/2 then find cos 165°.