Aflock of mallard ducks and a flock of pintail ducks are swimming in a lake. there are 28 ducks in each flock. if half the ducks from the mallard flock leave the lake, what is the total number of ducks that will remain in the lake?

15 points ! ~ see if you know the answer to both you!

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?