For all positive integers m, [m] = 3m when m is odd and [m] =1/2 m when m is even. Which of the following is equivalent to[9] x[6] ? 

The residents of Town Xparticipated in a survey to determine the number of hours per week eachresident spent watching television. Thedistribution of the results of the survey had a mean of 21 hours and a standarddeviation of 6 hours. The number ofhours that Pat, a resident of Town X, watched television last week was between1 and 2 standard deviations below the mean. Which of the following could be the number of hours that Pat watchedtelevision last week?

Last year, a certain publictransportation system sold an average (arithmetic mean) of 41,000 tickets perday on weekdays (Monday through Friday) and an average of 18,000 tickets perday on Saturday and Sunday. Which of thefollowing is closest to the total number of tickets sold last year?

In the arithmetic sequence t1, t2, t3, . . . , tn.  t1 = 23 and t_n = t_{n - 1} - 3 for each n >1. What is the value of n when tn = -4 ?

If a certain sample of data has a mean of 20.0 and astandard deviation of 3.0, which of the following values is more than 2.5 standard deviations from the mean?

If the average (arithmeticmean) of the 4 numbers n + 2, 2n - 3, 4n + 1, and 7n + 4 is 15, what is thevalue of n ?

If xy + z = x(y + z), whichof the following must be true?

At a constant rate of flow,it takes 20 minutes to fill a swimming pool if a large hose is used and 30minutes if a small hose is used. Atthese constant rates, how many minutes will it take to fill the pool when bothhoses are used simultaneously?

If x is a negative integer,which of the following expressions has the LEAST value?

If ~$\frac{x}{y}=\frac{2}{3}$~, then ~$\frac{x-y}{x}$~ =