Which relationship in the triangle must be true?

sin(b) = sin(a)
sin(b) = cos(90 – b)
cos(b) = sin(180 – b)
cos(b) = cos(a)

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?

Which fraction below is equivalent to 10/12?

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?