j + a = 50
j= a + 12
a+ 12 +a = 50
2a +12 = 50-12
2a = 38
a = 19
j =31
a = 19
Jordan is 31 years old and Anna is 19 years old. 
 
        
             
        
        
        
The expression represents commutative property of addition
Hope this helps 
-AaronWiseIsBae 
 
        
             
        
        
        
Answer:
It should be 1/25 
Step-by-step explanation:
If you only have those answers then answer D
 
        
             
        
        
        
Answer:
The answer is H 3
Step-by-step explanation: