Factor the common factor out of each expression. PLEASE HELP! WILL GIVE BRAINLIEST

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?

Can you simplify 4/7? 24 points will be awarded!

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?