Can someone give me the working out for 63000 divide by 90. I know the answer is 700 but i need to know how i got the answer please?

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?

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

What is the measure of angle x? answer