Answer:the X factor is 7 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The answer is, The fastest speed is 3/4 mile in 1/8 hour
Step-by-step explanation:
the answer i have = 6miles per hour and the rest of the answers are lower than that. 
 
        
             
        
        
        
The square root is <span>33.941125497
</span>
        
             
        
        
        
Nothing changes if you don't add anything. 
Example:
10+10=20
20+0=20
 
nothing changes.