Answer:

Step-by-step explanation:
I am assuming this problem reads 
- So let's start on the outside and work our way towards the middle
- Starting with the
, this can be simplified to
Now we have 
- Now simplifying what is inside the parenthesis we get
- Combining what we have the simplified for of the problem becomes:

Answer:
See the attachment. (All results are integers, so are correct to 6 decimal places.)
Step-by-step explanation:
The function simplifies to ...
... f(x) = x(x-9)/((x+1)(x-9))
... f(x) = x/(x+1) . . . for x ≠ 9
I think it's 54 miles per hour.
Because 18*3=54