Answer:
A) 27
Step-by-step explanation:

➡️ 
➡️ 
➡️ 
I didn't learn this. Sorry
Answer:
210
Step-by-step explanation:
The general formula for picking k items from a total of n is

Thus, if we want to select a committee of six people from a club with 10 members, the number of combinations is




= 210
The committee can be selected in 210 separate ways.
Answer:
31-3n
Step-by-step explanation:
d=-3
a1=28
an= 28+(n-1)(-3)=28-3n+3
an=31-3n
Answer:
A. 4(2y-9)
Step-by-step explanation:
Both terms are divisable by 4 and would bring them to the smallest whole degree