If P and S are rational numbers and R and Q are irrational numbers, which of these statements is true? A. The product of R and Q is always an irrational number.
B. The product of P and S is always a rational number.
C. The sum of R and Q is always an irrational number.
D. The sum of P and Q is always a rational number.​

Me what is the value of x? showing work would be appreciated - ! : )

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?

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?