2. Carol wants to find how many people in her town own a dog as a pet. She decides to survey
individuals walking out of the local pet store. She surveys every person who walks out and asks
them if they own a dog? Is this a random sample? Justify your response.

7x+8y=-18, 4x-9y=-3 solve the system of equations

Which of the following expressions is equal to 2x^2+8

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable