What contributes to the movement of air masses? weather boundaries
natural wind patterns
air pressure differences
rapid changes in weather

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

Find the maximum value of p= 4x + 5y subject to the following constraints :

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?