1.	Which element is in row 3, column 1?
		A.	-1	B.	9
		C.	4	D.	6
		Hint
	2.	Choose the matrix that represents the ordered triple (5, -7, 1).
		A.		B.	[5 -7 1]
		C.	[1 -7 5]	D.
		Hint
	3.	Solve .
		A.		B.	(-2, -8)
		C.	(2, 8)	D.
		Hint
	4.	What is always true of an n × n matrix?
		A.	It is a square matrix.	B.	It is a row matrix.
		C.	It has at least two rows and two columns.	D.	It is a column matrix.
		Hint
	5.	Solve
		A.	(2, –1)	B.	(–1, 2)
		C.	(–2, 1)	D.	(1, –2)
		Hint