Answer:
Option B
Step-by-step explanation:
Here we have to apply " combination and permutation. " It is given that the drama club had to choose three booths from a selection of 9, considering the possible ways to choose so. This is a perfect example of combination. In nCr, n corresponds to 9, respectively r corresponds to 3.

Hope that helps!
Answer: (4a+3b)(a−b)
Step-by-step explanation:
Factor by grouping
Answer:
x=-1
Step-by-step explanation:
1.) 2-3(2x-1)=-6x+5
2.) -1(-2x-1)=-6+5
3.) (2x+1)=-6+5
4.) (2x+1)=-1
5.) 2x=-2
6.) x=-1