By the binomial theorem,

I assume you meant to say "independent", not "indecent", meaning we're looking for the constant term in the expansion. This happens for k such that
12 - 3k = 0 ===> 3k = 12 ===> k = 4
which corresponds to the constant coefficient

Answer:
immune system
Step-by-step explanation:
I don't know exactly but I think the immune system
Answer:
For every 2 boys in class, there is 1 girl in class
Step-by-step explanation:
Answer:
I'm pretty sure the answer is D