1. plug in the numbers for the variables, like this: 9(-5)+18(-1)
2. solve
 Hopefully this helps! Let me know if you need more explanation.
        
             
        
        
        
Answer:im not sure sorry 
Step-by-step explanation:
 
        
             
        
        
        
Its 24,000  if the number goes to ten thousand's place..
        
             
        
        
        
Step-by-step explanation:
 f(x)=3x−2  so when the variable x is replace with an actual value ( − 1 ) we get  f(−1)=3(−1)−2
=−3−2
=−5
 
        
             
        
        
        
The answer is...
D)Multiplication