The fourth term of the binomial expansion
can be calculated using the formula for (i+1)-th term of the binomial expansion:

In order to find term
, determine that

Now

Answer: correct choice is A
f(4)= 4^2 - 1 = 15
g(f(4)) = g(15) = 2(15) = 30
Hope this helps!
Here is your answer in the picture
The real answer is going to be 23.5
Answer:
y = 3
Step-by-step explanation:
According to Euclidian theorem:
y^2 = 3*(12+3)
y^2 = 45 find the root of both sides
y = 3