1.	Solve .
		A.	0	B.	-2
		C.	1 or 4	D.	4
		Hint
	2.	Solve .
		A.	-2 or 7	B.	5
		C.	-2 or	D.	-2
		Hint
	3.	Suppose one runner can run 8 laps in 12 minutes, and another runner can run 8 laps in 10 minutes. If they start at the same time, after how many laps by the fast runner will he lap the slow runner?
		A.	after 8 laps	B.	after 7.5 laps
		C.	after 5 laps	D.	after 6 laps
		Hint
	4.	Juan and Sam have to complete 4 home repair jobs this week. If Juan works by himself, he can do the repairs in 7 days. With Sam helping him, they completed them in 3 days. How long would it take Sam to complete the repairs alone?
		A.		B.
		C.		D.
		Hint
	5.	Solve
		A.	{–3, 1}	B.	{–1, 4}
		C.	4 only	D.	–3 only
		Hint