1.	The solution of a system of three linear equations in three variables, x, y, and z, is called a(n) ____ (x, y, z).
		A.	ordered triple	B.	sum
		C.	integer	D.	ordered pair
		Hint
	2.	Solve the system of equations.
		A.	(0, -2, 7)	B.	no solution
		C.	infinite number of solutions	D.	(1, 1, 2)
		Hint
	3.	Solve the system 4y – 6x + 8z = 13, 10y – 15x + 20z = 6, y – 5x + 2z = 5.
		A.	infinite solutions	B.	no solution
		C.	(-3, 1, 7)	D.
		Hint
	4.	At a firm, there are three workers that are supposed to work a combined 110 hours per week. Worker 1 is supposed to work 5 hours more than worker 2, and worker 2 is supposed to work 15 hours more than worker 3. How long should each one work?
		A.	worker 1: 40worker 2: 45worker 3: 25	B.	worker 1: 45worker 2: 40worker 3: 25
		C.	worker 1: 42.5worker 2: 37.5worker 3: 30	D.	worker 1: 45worker 2: 35worker 3: 30
		Hint
	5.	At a firm, there are three workers that are supposed to work a combined 110 hours per week. Worker 1 gets paid $10 per hour, worker 2 gets paid $12 per hour, and worker 3 gets paid $14 per hour. If the company wants their total income to be $1268, how many hours should each one work if worker 3 and worker 2 work for the same amount of hours?
		A.	worker 1: 54worker 2: 28worker 3: 28	B.	worker 1: 40worker 2: 35worker 3: 35
		C.	worker 1: 44worker 2: 33worker 3: 33	D.	worker 1: 14worker 2: 48worker 3: 48
		Hint