Answer:
246.
Step-by-step explanation:
Let the number be 2xy, then 
2 + x + y = 2y    and y must be even because the whole number is even.
y = 2 + x .
Now x must be even because y is even.
The only 2 numbers which fit are x = 4 and y = 6 so the number is 246.
Checking: 2+4+6 = 12 and 12 = 2*6.
 
        
             
        
        
        
You can use bar graphs to compare quantities in real life situations by comparing different amounts, ex. you might use them for comparing different prices at a coffee shops around the world or different types of dogs you see at a park on a sunny day. You can really use bar graphs for comparing anything.
        
             
        
        
        
2b+15 
2 dollars for each book so you multiply it by the number of books and add 15 because it is a one time fee.
        
             
        
        
        
The divsion is the one basic sign in mathmatics. And division express by different sign. example, by long division, and fraction sign( / )  
The answer of division problem is quotient. 
that means, 6/3=2 
The answer two is the quotient.