9. 5y
10. 102 square-4
11. 2a5 square +5b
12. 8m+2+4n
        
                    
             
        
        
        
If its 21 inches then rounding to the nearest who should be 21 inches
        
                    
             
        
        
        
The answer will also decrease.
        
                    
             
        
        
        
The first thing you should do when dealing with implicit derivatives is to respect the rules of derivation of both the logarithm and the exponential
 Then, you must regroup the terms correctly until you get dy / dx
 The answer for this case is D
 I attach the solution
 
        
        
        
Answer:
as in the number line negative digits occur on the left side if we subtract -2 from -8 we will get our answer that is -6
Step-by-step explanation:
-8-(-2)
-8+2
-6