Answer:
the answer is z=63 
Step-by-step explanation:
 
        
             
        
        
        
What is this type of math called please and what year/grade if you don’t mind me asking so I can be prepared
        
                    
             
        
        
        
The answer is 1:11. After it being simplified from 6:66. Hope this helps.
        
                    
             
        
        
        
15,567 because yeah i know math