How many multisets of three positive integers have a mean of 9, a median of 11 and no mode?

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?

For which rational expression is -2 an excluded value of x?

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.