Find m∠khg.

m∠ihg = 161°
m∠ihk = (3x + 4)°
m∠khg = (7x + 7)°

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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 one ? is the answer and how to find this answer

Evaluate the expression. (9 + 5)(3 + 2)0