Tom rolls 2 fair dice and adds the results from each. Work out the probability of getting a total that is a factor of 21.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

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

Me n o w. i need t h i s. 10 points