1inc_anaxos_500_act_math_questions_to_know_by_test_day-108

Prévia do material em texto

269.			If	k	=	−1,	then	
(A)			−(x2	+	y2)
(B)			x2	+	y2
(C)			x2	+	2xy	+	y2)
(D)			−(x2	+	2xy	+	y2)
(E)			x2	−	2xy	−	y2
270.			If	log2	x	=	3,	what	is	the	value	of	x?
(A)			1
(B)			2
(C)			6
(D)			8
(E)			9
271.			The	expression	(x	−	a)(x	+	a)	=
(A)			x2	−	2a
(B)			x2	−	a2
(C)			x2	−	2a	−	a2
(D)			x2	−	2a	+	a2
(E)			x2	+	2a	−	a2
272.			If	 	and	x	>	0,	what	is	the	value	of	x?
(A)			
(B)			
(C)			
(D)			3
(E)			6
273.			For	what	values	of	b	and	c	would	the	following	system	of	equations	have