the sum of the digits of a three digit number 12 the tens digit is two more than the hundreds digit the unit's digit is equal to the sum of the tens and hundreds digit what is the number the three-digit number is

Can someone, me with this.i really need with this

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?

What is 10+10+20 about the origin the square root of a triangle.