Answer:
 The difference of fifty-four and seven times a number is written as 54 - 7x.
Step-by-step explanation:
Given: expression “the difference of fifty-four and seven times a number”
We have to write the given algebraic expression represents “the difference of fifty-four and seven times a number” 
Consider the given algebraic expression represents “the difference of fifty-four and seven times a number”
Let the number be x 
Then, seven times a number is 7x 
And the difference of fifty-four and seven times a number is written as 54 - 7x.
Thus, The difference of fifty-four and seven times a number is written as 54 - 7x.
 
 
        
                    
             
        
        
        
Answer:
The answer is B. 50
Step-by-step explanation:
180-105=75
75+55=130
180-130=50
 
        
             
        
        
        
The answer is D because if you plug in the ordered pair in their correct places the equation becomes 4+6=10.