Answer:
hope this helps
check the picture attached for steps
 
        
             
        
        
        
The answer for simplifying the fraction would be 7/12 and in decimal form 7/12 to decimal would be 0.583333
        
                    
             
        
        
        
Answer:
x = 21.
Step-by-step explanation:
AS there are parallel lines:
4/12 = 7/x
4x = 84
x = 84/4 = 21.
 
        
             
        
        
        
Answer is a because a^-2 will be changed to 1/a^2
Hope that helps