1.	Simplify .
		A.		B.
		C.		D.
		Hint
	2.	Simplify .
		A.		B.
		C.		D.
		Hint
	3.	Simplify .
		A.		B.
		C.		D.
		Hint
	4.	Simplify .
		A.		B.
		C.		D.
		Hint
	5.	What is the LCM of and .
		A.	(r – 1)(r + 3)(r + 9)	B.	r(r – 1)2(r + 3)(r + 9)
		C.	r(r – 1)(r + 3)(r + 9)	D.	(r – 1)2(r + 3)(r + 9)
		Hint