Agumball machine has 2 red gumballs and 2 green ones. if you buy 2 gumballs, what is the probability of both of them being red?

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid