Answer:
6
Step-by-step explanation:
See image below:)
 
        
                    
             
        
        
        
Answer: The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!
Step-by-step explanation:
 
        
             
        
        
        
I believe it's 3 because 4 times 3 equals 12 and 12 plus 8 equals 20! 
4(3)+8=20
Hoped this helped! :)
        
                    
             
        
        
        
The NFL started August 20, 1920
        
                    
             
        
        
        
Answer:
Bill has $21.
Step-by-step explanation:
There's $135. 84/4=21. At the same time, 21+9=30. 30+21+84=135.