Solve the system of equations y=2x+7
y=5x-7
x=
Y=

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?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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