Answer:
20
Step-by-step explanation:

3 weeks from tomorrow will be Wednesday
Answer:
36
Step-by-step explanation:
Hello,
If
it becomes

and 

So,

a = 1
b = 1
c = 17
d = 17
e = 0
Then a + b + c + d + e = 36
Thanks
N = ((n-1) + 4) + 4, to my understanding.
although your answers seem right written in the columns, but your method of applying numbers to equation seems incorrect in 'expand' column. for example, answer for 3 should be something like this...
3 21 17+4
4 25 21+4
hope it helps.
The given function is that is a cubic polynomial

when arranged in descending order that is from highest degree to lowest degree

Since it is a three degree polynomial it has three roots.
According to rational root theorem , the possible roots of the above expression that is factors of
=
are 
As you can see from the graph all roots of this polynomial are real.
The smallest positive root is 0.954 and smallest negative root are -0.724.