Huhhhhhhhhh whaatttt ?!?!
There are 10 possible digits and 26 possible letters.
To find the answer to this problem we have to multiply 9 as many digits has the hotel reservation number and 26 as many letters it has.
It means:

There are 1,119,214,746 possible reservation numbers.
Answer:
-2 : -1
-1 : -1/2
0 : 0
1 : 1/2
2 : 1
3 : 3/2
4 : 2
5 : 5/2
6 : 3
Step-by-step explanation:
Plug in whatever is on the left side of the table to the x in the equation (1/2 x)
Ex. y = 1/2 (4)
y = 2
800,000
60,000
3,000
100
40
1
800,000+60,000+3,000+100+40+1