A set of weights includes a 4lb barbell and 6 pairs of weight plates. Each pair of plates weighs 20lbs. If x pairs of plates are added to the barbell, the total
weight of the barbell and plates in pounds can be represent by
f (x) = 20x + 4.
What is the domain of the function for this situation?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.