1.	Solve .
		A.	0, 1	B.	1
		C.	-3, 1	D.	-3, -1
		Hint
	2.	Solve
		A.	0	B.	-1
		C.	-1, 4	D.	1, 4
		Hint
	3.	Suppose that Pam could build a house in months and Jerry could build a house in months. If they work together, how long would it take them to build the house?
		A.	10 months	B.	months
		C.	months	D.	5 months
		Hint
	4.	Solve . Check your solution.
		A.	–4	B.	6
		C.	6 and –2	D.	–2
		Hint
	5.	John ran a marathon on a windy day. He ran the first 13 miles into the wind, and the last 13 miles with the wind at his back, and he completed the course in 3 hours. How fast is John in still conditions if the wind speed was 4 miles per hour?
		A.	8.7 mph	B.	10.2 mph
		C.	12.7 mph	D.	–1.6 mph
		Hint