

1. 
Find the value of . 


A. 
24 
B. 
24 


C. 
28 
D. 
28 


Hint 


2. 
Which of the following shows the system of equations using a matrix equation? 





A. 

B. 



C. 

D. 



Hint 


3. 
Find the inverse of . 


A. 
0 
B. 



C. 

D. 
does not exist 


Hint 


4. 
Find the inverse of . 


A. 

B. 



C. 

D. 



Hint 


5. 
Solve this problem using matrix equations.How many liters of 0.25 solution and 0.40 solution should be combined to make 10 liters of 0.35 solution? 


A. 
2.5 L of the 0.25 solution and 7.5 L of the 0.40 solution. 


B. 
6.66 L of the 0.25 solution and 3.33 L of the 0.40 solution. 


C. 
3.33 L of the 0.25 solution and 6.66 L of the 0.40 solution. 


D. 
4.5 L of the 0.25 solution and 5.5 L of the 0.40 solution. 


Hint 

