Please help
90 is 18% of what number?

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?

To decrease an amount by 16% what single multiplier would you use

What is the value of p in the equation y^ = -4x?