1.	Write a matrix for the system of equations.
		A.		B.
		C.		D.
		Hint
	2.	Write the matrix equation as a system of linear equations.
		A.	-2s + t = 7 5s + 8t = 12	B.	-2s = 7 5t = 12
		C.	-2s + t = 12 5s + 8t = 7	D.	-2s + 5t = 7 s + 8t = 12
		Hint
	3.	Which of the following is a matrix equation for the system 5x – 3y =11, –3x + 2y = 7?
		A.
		B.
		C.
		D.
		Hint
	4.	Solve the system of equations 7x – 14y =4, 3x – 6y =17.
		A.	(3, –2)	B.	no unique solution
		C.	(2, 1)	D.	infinite solutions
		Hint
	5.	Suppose a matrix equation of a system of equations does not have a unique solution. What cannot be true?
		A.	ad – bc ? 0	B.
		C.		D.	is undefined
		Hint