On average 5.5 users sign-up for an on-line social networking site each minute. What is the probability that:. a. More than 7 users will sign-up for the social networking site in the next minute?
b. More than 13 users will sign-up for the social networking site in the next 2 minutes?
c. More than 15 users will sign-up for the social networking site in the next 3 minutes?

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14