The expression 3 × 7 – 4 × 8 + 2 is equivalent to which of the following?

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?

What is the standard form of -5x^2+2x^4-11+x^3+3x

When you answer this can you explain