Answer:
Option A is correct that is 
Step-by-step explanation:
We have been given a formula 

We will put values of n in
when n=2 we get
when n=3
Therefore, Option A is correct that is 
Answer:
16
Step-by-step explanation:
(b/2)^2
(8/2)^2 = (4)^2 = 16
(x^2+8x+16) = -3+16
(x+4)^2 = 13
so on so forth, but basically you add 16 which completes the square
Answer:
64+24
Step-by-step explanation:
Answer:39
Step-by-step explanation:
y(3) = 117
3y/3 =117/3
y = 39
Answer:
15 hours
Step-by-step explanation: