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 + 5t = 7 s + 8t = 12
		C.	-2s = 7 5t = 12	D.	-2s + t = 12 5s + 8t = 7
		Hint
	3.	What is the first step in solving the matrix equation
		A.	Multiply each side of the matrix equation by the identity matrix.
		B.	Multiply each side of the matrix equation by
		C.	Find the inverse of
		D.	Divide each side of the matrix equation by
		Hint
	4.	Which of the following is a matrix equation for the system 5x – 3y =11, –3x + 2y = 7?
		A.
		B.
		C.
		D.
		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.	is undefined
		C.		D.
		Hint