Answer:
84 different lineups are possible
Step-by-step explanation:
The order in which the songs are chosen is not important. So we use the combinations formula to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.

In this question:
6 musics from a set of 9. So

84 different lineups are possible
The awnser for question 5 is 4/6
Answer:
Step-by-step explanation:
Yes as the x term is to the first power and is not raised to a larger exponent.
Answer:
It compresses up 2
Step-by-step explanation: