As there are 81 tiles total, that makes your area 81. Being a square, that makes your area equation A=s^2. As you need a side, this makes your equation s=√A. Plugging in 81 as A, we get s=√81=9, so an edge has 9 tiles.
        
             
        
        
        
0.5 that would be half of one if one is greater than the variable M 
I really hope this helped ... have a great day !
        
             
        
        
        
The correct answer is b because the number increases by 4 every time 
hope I helped
        
             
        
        
        
Answer:
The answer is the 3rd one or C 
hope this helps:)
Step-by-step explanation: