7/15 will be the most you can simplify
        
                    
             
        
        
        
Answer:
Step-by-step explanation:.
 
        
             
        
        
        
Answer:
Concave octagon
Step-by-step explanation:
Concave octagon:
-   This polygon has 8 sides. So it is a octagon.
-   If one interior angle measures more than 180, then it is concave polygon.   
So, this is a concave octagon
 
        
             
        
        
        
Answer:
In khan academy, just plot the points and the answer is yes.
Step-by-step explanation:
Use the table to plot the points and you'll figure out that it's proportional- so the answer to the question below is yes. Doesn't need too much explaining.