Agirl bought a dog for $5 sold it for $10 bought it back for $20 and sold it for $25 how much $ did she gain or lose

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

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?

Asap! i need this done today and i really don’t understand it. some one ! will mark