Answer: the answer is 25
Step-by-step explanation:
 
        
             
        
        
        
$8.89 
hope this helps!!:)
        
                    
             
        
        
        
Answer:
-4x - 20x
Step-by-step explanation:
Multiply 2 by -10
 
        
                    
             
        
        
        
The number of ways of choosing 4 digits from 10 digits without replacement ( order is important) is  . This is the number of all possible permutations of choosing 4 from 10. The first 4 numbers of your phone number is a unique 4 digit number(4 different digits). The required probability is
. This is the number of all possible permutations of choosing 4 from 10. The first 4 numbers of your phone number is a unique 4 digit number(4 different digits). The required probability is

 
        
             
        
        
        
The time that taken for the two trains is 1.2 hours. 
The computation of the time taken for the two trains is shown below:
Given that 
The westbound train travels 55 miles per hour.
And, the eastbound train travels 75 miles per hour.
So, the total speed is 
= 55 miles per hour + 75 miles per hour
= 130 miles per hour
The distance is 156 miles
So, the time taken is 

= 1.2 hours 
Therefore we can conclude that the time that taken for the two trains is 1.2 hours. 
Learn more about the speed here: brainly.com/question/21791162