The binomial expansion:

a = 2y, b = 4 x^3, n = 4
( x )^3k = x^ 9
k = 3


Answer: the coefficient is
512.
Answer:80
Step-by-step explanation:if you multiply a times 20 to get 5, you have to multiply b times 20 to get 80
All have 4 sides. That’s what I would put. Good luck and don’t copy links they’re most likely viruses
Answer: 8/4
Step-by-step explanation: if I’m wrong just watch the video for a hint it helps