Answer:
A
Step-by-step explanation:
Rectangular Pyramid
 
        
             
        
        
        
Since the problem states "a number" and again "a number", I assume it;'s the same number. Let the number be x.
12x - 9x = 3x
The difference of twelve times a number and nine times a number is three times the number.
 
        
                    
             
        
        
        
Answer:
18
Step-by-step explanation:
Just multiply them. 6 x 3 would be the formula in this situation. The other formula would be bh or bxh.
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
degree 1