What is the mode?

0 7 7 7 0

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?

Y=4x^2+x-1 solve using quadratic formula

Find the value of the cosine for angle a