Answer:100
Step-by-step explanation: i looked it up
First you have all ten books, but then every time after, you loose one because you can't put the same book in the group twice.
10 * 9 * 8 * 7 = 5040 groups
Answer A and Answer D along with the ones you picked beforehand
Answer:
25 Or A
Step-by-step explanation:
Answer:
(-∞, 0) U (8, ∞)
Step-by-step explanation:
