Mr. smith is unhappy with a 2-foot concrete walkway around the edge of his pool. he decides to put a different width around the pool. the total area of the pool and the walkway is given by the polynominal x^{2} + 17x +66 where x represents the width of the pool. determine the width of the walkway.

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?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Using elimination, what is -4x+2y=-12 4x+8y=-24