Step-by-step explanation:
1/20-1/4 ×<1/5-2/5×
<h3>collection of like terms</h3>
1/20+1/5 <-2/5×-1/4×
<h3>= 1/4 <-13/20×</h3>
 
        
             
        
        
        
Answer:
W number - blank is 51. 
Step-by-step explanation:
I don't understand what the question is. What is the number unless you want something random then here: 
Blank - 52
a number = 1
52 - 1 = 51
 
        
             
        
        
        
Answer:
It is difficult to give a specific answer without your scenario but maybe this may help you out a bit.
Let's say you have a line like the one attached:
I labelled certain points b and u so you can use it as a reference. Now all you need to do is count all the points that lie on the same line and are found between. 
In this case it would be point d and point e because the rest of the points do not line on the same line. For this problem particular scenario, the answer would be 2.  
 
        
             
        
        
        
Answer:
D
Step-by-step explanation:
 
        
                    
             
        
        
        
You collect the “like terms” and simplify which would bring you down to 1789b which is equivalent to 1345b. Then you move the “variable” to the “left-hand” side and change its sign which would give you 1789b-1345b=0. Then again collect the “like terms” which would bring you 444b=0. Then you divide the both sides of the equation by 444 and it would mean b=0. So your answer is b=0