几个英语计算试题1.Onaroadmapwithascale-查字典问答网
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  几个英语计算试题1.Onaroadmapwithascaleof1/4inchper10miles,thehighwayfromWaukeetoWintersetis1又3/8incheslong.Howmanymileslongisthishighway?A.44B.55C.65D.702.Thepriceofgasolinehasincreasedby5%duringthepastm

  几个英语计算试题

  1.Onaroadmapwithascaleof1/4inchper10miles,thehighwayfromWaukeetoWintersetis1又3/8incheslong.Howmanymileslongisthishighway?

  A.44

  B.55

  C.65

  D.70

  2.Thepriceofgasolinehasincreasedby5%duringthepastmonth.Ifthepricepergallonamonthagowas$1.20,whatisthecurrentpricepergallon?

  A.$1.24

  B.$1.25

  C.$1.26

  D.$1.70

  E.$1.

  3.Whichofthefollowingfractionsisequivalentto0.05?

  A.1/5

  B.1/20

  C.1/25

  D.1/50

  E.1/200要过程

  4.Whatisthedistancebetweenthepointswith(x,y)coordinates(3,-2)and(-3,-1)?

  5.Iff(x)=x的平方-2,thenf(a+2)=?

  6.For0度

1回答
2020-05-15 00:20
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  1.B1又3/8inches=11/8inches=11/8除以1/4*10=55miles

  2.C1.2*5%=0.060.06+1.2=1.26pergallon

  3.C0.05=5/100=1/25

  4.根号下(3--3)平方+(1--2)平方=3*根号下5

  5.x=1,y=-1

  x=0y=-2x=0y=0

  x=-1y=-1

  f(x)=x的平方

  6.CsinX=(1-cosX的平方)

  2-2cosX的平方=cosX

  -2cosX的平方-cosX+2=0

  2cosX的平方+cosX-2=0

  b的平方-4ac=9cosX的平方大于0

  所以有两个根

2020-05-15 00:24:32

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