What number is a common multiple of five and nine?

Find the domain of the following expression: 1/(√x)-2

What is the difference between the equations of a vertical and a horizontal line?

Which question is not a good survey question? a.don't you agree that the financial crisis is essentially over? 63on average, how many hours do you sleep per day? c. what is your opinion of educational funding this year? d.are you happy with the availability of electronic products in your state?