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8 金币

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MathSection

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Q1:
Ifkisnegative,whichofthefollowingmustalsobenegative?

(-k)2
(-1)k
1-k
k+1
k-1
Answer:
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Q2:
OnSaturdaymorning,Malachiwillbeginacampingvacationandhewillreturnhomeattheendofthefirstdayonwhichitrains.Ifonthefirstthreedaysofthevacationtheprobabilityofrainoneachdayis0.2,whatistheprobabilitythatMalachiwillreturnhomeattheendofthedayonthefollowingMonday?

0.008
0.128
0.488
0.512
0.640
Answer:
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Q3:
Eachofthe45boxesonshelfJweighslessthaneachofthe44boxesonshelfK.Whatisthemedianweightofthe89boxesontheseshelves?
(1)	TheheaviestboxonshelfJweighs15pounds.
(2)	ThelightestboxonshelfKweighs20pounds.
	
A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.
B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.
C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.
D.EACHstatementALONEissufficient.
E.Statements(1)and(2)TOGETHERareNOTsufficient.
Answer:
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Q4:
WhatisthetotalvalueofCompanyH’sstock?
(1)	InvestorPowns¼ofthesharesofCompanyH’stotalstock.
(2)	ThetotalvalueofInvestorQ’ssharesofCompanyH’sstockis$16,000.
	
A.Statement(1)ALONEissufficient,butstatement(2)aloneisnotsufficient.
B.Statement(2)ALONEissufficient,butstatement(1)aloneisnotsufficient.
C.BOTHstatementsTOGETHERaresufficient,butNEITHERstatementALONEissufficient.
D.EACHstatementALONEissufficient.
E.Statements(1)and(2)TOGETHERareNOTsufficient.
Answer:
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Q5:
If(y+3)(y-1)–(y-2)(y-1)=r(y-1),whatisthevalueofy?
(1)	r2=25
(2)	r=5
	
A.State