Gina paid $54 for a total of 15 bags of treats for the cats and dogs at the shelter. She paid $3 for each bag of cat treats and $4 for each bag of dog treats. What system of equation represents this problem.

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.