Answer:


Step-by-step explanation:
Solving (47):
To solve for B, we have:
 --- sum of angles in a triangle
 --- sum of angles in a triangle
This gives

Collect like terms


Solving (48):
To solve for Y, we have:
 --- sum of angles in a triangle
 --- sum of angles in a triangle
This gives

Where
 -- angle on a straight line
 -- angle on a straight line
Solve for X


So, we have:



 
        
             
        
        
        
Answer:
n<2
Step-by-step explanation:
move all terms not containing n to the right side of the inequality 
 
        
             
        
        
        
Answer: He has 7 books. 
Step-by-step explanation:
9 - 2 = 7
 
        
                    
             
        
        
        
Answer:Terminating decimals: Terminating decimals are those numbers which come to an end after few repetitions after decimal point. Example: 0.5, 2.456, 123.456, etc. are all examples of terminating decimals.
Step-by-step explanation:
:D
 
        
             
        
        
        
Y is 13 when you solve the problem