Answer:
-18
Step-by-step explanation:
Left Hand Side = -2(7a + 9b) = -14a - 18b
Comparing it with Right Hand Side, ?  = -18
 
        
                    
             
        
        
        
Answer:
nothing
Step-by-step explanation:
The ones digit will not change.....only the 'tens' digit will change...
 
        
             
        
        
        
sides of right angle triangle follows Pythagoras theroem
which states 
a^2 +b^2 = c^2
where a , b and c are sides of right angle triangle.
here none of options do not follow this.
so answer is option D 
 
        
                    
             
        
        
        
The volume of the pyramid is 15 yd