Answer:
hm 2
Step-by-step explanation:
 
        
                    
             
        
        
        
If 

 is invertible, then we can simply choose 

 because for any invertible matrix 

 by definition we must have 

.
We have 

, as

which means 

 is non-singular and has an inverse. The inverse itself would be
 
 
        
        
        
Answer:
10 bags
Step-by-step explanation:
Take the number of bags raked and divide by the number of hours
30bags/ 3 hours
10 bags per hour
In 1 hour we can rake 10 bags
 
        
             
        
        
        
Answer:
I would say A but i am not sure i did not take the test
Step-by-step explanation:
 
        
             
        
        
        
Step-by-step explanation:
Divide 7560 by 9 you get 840. Then you times 840 by 4 you get 3360, Multiply 840 by 5 you get 4200.