1.	Find the value of .
		A.	-28	B.	28
		C.	-24	D.	24
		Hint
	2.	Find the inverse of .
		A.		B.
		C.		D.
		Hint
	3.	Solve the systems of equations by using matrix equations.
		A.		B.
		C.		D.
		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.	6.66 L of the 0.25 solution and 3.33 L of the 0.40 solution.
		B.	4.5 L of the 0.25 solution and 5.5 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.	2.5 L of the 0.25 solution and 7.5 L of the 0.40 solution.
		Hint