It would just be 8 since an integer just means whole number.
Answer:

Step-by-step explanation:

Combine 

Combine the bottom, too.

Apply the fraction rule

Cancel

Therefore, 
Answer:
-1
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(4-7)/(8-5)
m=-3/3
m=-1
You have to take the amount of money payed, which in this case is 45.50, and divide it with 7.