What is the value of 5x2-1.9x-3.7 for x=-0.3?

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问题 What is the value of 5x2-1.9x-3.7 for x=-0.3?

选项 A、-4.72
B、-3.82
C、-3.58
D、-2.68
E、0.57

答案D

解析 The equation 5×[(-0.3)×(-0.3)]-1.9×(-0.3)-3.7=0.45+0.57-3.7=-2.68.

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What is the value of 5x2-1.9x-3.7 for x=-0.3?

GMAT QUANTITATIVE

GMAT

IwassofamiliarwithherthatIrecognizedhervoice______Ipickedupthephone.

Inthedeadman’sbedroomthepolicefoundseveralimportant______whichpointedtoBlakeasthemurderer.

Concerningmoneyoranythingelse,conflictsbetweenhusbandandwifeusuallyreflectapowerstruggle.Conflictsbetweenparent

Howcanwegetridofgarbage?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?Thesearetwoimportantque

Wehadn’tmetfor20years,butIrecognizedher______Isawher.

【T1】Withoutanydoubt,Brazilisoneofthebiggestsoccercountriesintheworld.FormillionsofBrazilians,soccerisa"way

Toronto’sthirdCityHall,nowknownasOldCityHall,wasdesignedbyEdwardJamesLennoxanddeclaredopenonSept.18,1899.

Agoodtitleforthispassageis.Theaveragenumberofhoursofsleepthatanadultneedsis.

Whatyou’realwaysheard?We’reeatingtoomuchsalt.TheaverageAmericangetsabout3.4gramsofsodiumeveryday,farmoreth

RectangleRhaslength30andwidth10,andsquareShaslength5.TheperimeterofSiswhatfractionoftheperimeterofR?

甲因其妻难产而死而怨恨其儿子乙，使其挨饿受冻，并经常打骂。后在一次打骂过程中，致乙左眼失明。关于本案，下列分析正确的有：()

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中药全浸膏粉制颗粒，常选用的润湿剂是

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设区域D={(x，y)|x2+y2≤1，x≥0}，计算二重积分

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