1.	Find the value of .
		A.	28	B.	-28
		C.	-24	D.	24
		Hint
	2.	Find the value of the determinant .
		A.	-3	B.	-25
		C.	-43	D.	-29
		Hint
	3.	Find the inverse of .
		A.		B.
		C.	does not exist	D.	0
		Hint
	4.	Find the inverse of .
		A.		B.
		C.		D.
		Hint
	5.	Set up a matrix equation for this chemistry problem. How many liters of 0.25 solution and 0.40 solution should be combined to make 10 liters of 0.35 solution?
		A.		B.
		C.		D.
		Hint