1.	Simplify 6a + 15a.
		A.	6a + 15a	B.	21a
		C.	21a2	D.	42a
		Hint
	2.	Simplify 12y + 8y.
		A.	4y	B.	20y
		C.	20y2	D.	simplified
		Hint
	3.	Simplify 3x2 + 11x + 2x2.
		A.	5x2 + 11x	B.	16x2
		C.	simplified	D.	6x2 + 11x
		Hint
	4.	Evaluate p · (p + 3q) – r if p = -7, q = 4, and r = -16.
		A.	-51	B.	-19
		C.	77	D.	45
		Hint
	5.	Simplify m – 4n + 8m.
		A.	–4m – 4n	B.	5m
		C.	9m – 4n	D.	–4n – 4m
		Hint