sat数学试题.docx

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sat数学试题

 SAT数学题分成了选择题和计算题,相对于SAT数学选择题,答案还有一些提示的作用,SAT数学计算题就需要大家自己进行解答了。

下面为大家推荐的这道SAT数学计算题是非常典型的代数方程类的题目,大家一起来看看吧。

  

   

  Whatvalueof satisfiesbothoftheequationsabove?

  Thecorrectansweris1/2or.5

  Explanation

  Difficulty:

Medium 

 

  Since ,thevalueof iseither or .

 

    

       

       

 

  OR

       

       

       

 Thetwovaluesof thatsatisfythefirstequationare and .

  Since ,thevalueof iseither or .

 

  

       

      

  OR

       

        

       

  Thetwovaluesof thatsatisfythesecondequationare and .

  Youareaskedtofindthevalueof thatsatisfiesbothequations.Thatvalueis .Theanswercanbeenteredinthegridas or .

下面是两道SAT数学练习题,都是选择题,后面附有答案及其解析。

SAT数学练习题可以让大家更快更好的了解SAT数学考试的出题方式以及应对方式。

下面是详细内容,我们一起来看一下这些SAT数学练习题的吧。

  1、ConeAhasvolume24.Whenitsradiusandheightaremultipliedbythesamefactor,thecone’ssurfaceareadoubles.WhatisConeA’snewvolume?

  (A)

  (B)48

  (C)

  (D)96

  (E)Notenoughinformationtotell

  2、Arectanglestandssothatits6inchsideliesflatagainsttheground.Iftherectangleisrotatedaroundtheaxisofoneofitstwo4inchsides,whatisthevolumeoftheresultingcylinder?

  (A)24Ï€

  (B)36Ï€

  (C)64Ï€

  (D)96Ï€

  (D)144Ï€

  Answers

  1、C

  Theformulaforacone’ssurfaceareaisπr2+πrl.Acone’svolumeis1/3πr2h.Soifthedimensionsofaconearemultipliedbythesamefactor,a,

  thenitssurfaceareamultipliesbythesquareofthatfactor.Ifthedimensionsofaconearemultipliedbythesamefactor,thevolumebecomesmultipliedbythecubeofthatfactor:

  Ingeneral,forsolids,ifeachdimensionofaconeismultipliedbythesamefactor,thesolid’ssurfaceareaismultipliedbythesquareofthatfactor,anditsvolumeincreasesbythecubeofthatfactor.IfthesurfaceareaofConeAdoubles,itsdimensionsaremultipliedbyafactorofThus,thecone’svolumeismultipliedbyafactorofConeA’snewvolumeis

 

  2、E

  Iftherectangleisrotatedaboutasideoflength4,thentheheightofthecylinderwillbe4andtheradiuswillbe6.

  Onceyouvisualizethecylinder,youcanpluginthevaluesforthevolumeofacylinder:

一道SAT数学题(抛物线)

天道留学  时间:

2011-08-26

点击:

26次

  下面是一道关于抛物线的SAT数学题及其解法的内容,非常详细。

SAT题中,抛物线是必考的一类,虽然中学课程都有所涉及,还是相对比较抽象,尤其是在理解SAT数学题的表达方式上。

下面我们来看看这道关于抛物线的SAT数学题吧。

      ReadthefollowingSATtestquestionandthenclickonabuttontoselectyouranswer.

  

 

  Thequadraticfunctionisgraphedinthe-planeabove.If forallvaluesof,whichofthefollowingcouldbethecoordinatesofpoint?

  AnswerChoices

  (A)

 

  (B)

 

  (C)

 

  (D)

 

  (E)

 

  ThecorrectanswerisC

  Explanation

  Thefactthatforallvaluesofmeansthatthepointisthemaximumofthequadraticfunction,somustbethevertexoftheparabola.Theparabolaintersectsthe-axisatthepointsand,somustbehalfwaybetweenand.Therefore,.Ofthechoices,theonlyonewith-coordinateequaltois.Therefore,couldbethecoordinatesofpoint.

1.Whatisthelengthofthelinesegmentinthex-yplanewithendpointsat(-2,-2)and(2,3)?

  A.3

  B.√31

  C.√41

  D.7

  E.9

  CorrectAnswer:

C

  解析:

  Sketchadiagramandcalculatethedistance(hypotenuseofarighttriangle)usingPythagorastheorem.

  

 

  Verticalheightoftriangle=5;horizontalside=4;hypotenuse=√(25+16)=√41

  2.nisanintegerchosenatrandomfromtheset{5,7,9,11}

  pischosenatrandomfromtheset{2,6,10,14,18}

  Whatistheprobabilitythatn+p=23?

  A.0.1

  B.0.2

  C.0.25

  D.0.3

  E.0.4

  CorrectAnswer:

A

  解析:

  Eachoftheintegersinthefirstsetcouldbecombinedwithanyfromthesecondset,givingatotalof4x5=20possiblepairs.Ofthesethecombinationsthatcouldgiveasumof23are(5+18),and(9+14).Thismeansthattheprobabilityofgettingasumof23is2/20=1/10

  3.Adressonsaleinashopismarkedat$D.Duringthediscountsaleitspriceisreducedby15%.Staffareallowedafurther10%reductiononthediscountedprice.IfastaffmemberbuysthedresswhatwillshehavetopayintermsofD?

  A.0.75D

  B.0.76D

  C.0.765D

  D.0.775D

  E.0.805D

  CorrectAnswer:

C

  解析:

  Ifthepriceisreducedby15%,thenthenewpricewillbe0.85D.Ifthisnewpriceisfurtherreducedby10%,thediscountedpricewillbe0.9x0.85D=0.765D

  

 

  4.Allthedotsinthearrayare2unitsapartverticallyandhorizontally.Whatisthelengthofthelongestlinesegmentthatcanbedrawnjoininganytwopointsinthearraywithoutpassingthroughanyotherpoint?

  A.2

  B.2√2

  C.3

  D.√10

  E.√20

  CorrectAnswer:

E

  解析:

  Thelongestlinesegmentthatcanbedrawnwithoutpassingthroughanydotsotherthanthoseatthebeginningandendofthesegment,suchalinecouldgofromthemiddledotinthe

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