1.	Find the values of x and y for which the matrix equation is true.
		A.	x = -3, y = 1	B.	x = -1, y = -3
		C.	x = 1, y = -3	D.	x = -3, y = -1
		Hint
	2.	If A = , find -2A.
		A.		B.
		C.		D.
		Hint
	3.
		A.		B.
		C.		D.	The product doesn't exist.
		Hint
	4.
		A.	[-1 1 18]	B.	impossible
		C.		D.	[4 5 6]
		Hint
	5.
		A.		B.
		C.	impossible	D.
		Hint