Juan walked 3 more miles than Rebecca. Rebecca walked 4 times as far as William.

游客2024-01-12 32

问题 Juan walked 3 more miles than Rebecca. Rebecca walked 4 times as far as William. William walked 2 miles. Which of the following mathematical expressions is equivalent to the number of miles Juan walked?

选项 A、3×4×2
B、(2 + 4)× 3
C、4(2)+ 3
D、4 + 3 + 2

答案 4(2)+ 3

解析 To solve this problem, start with William and work backward. William walked 2 miles, and Rebecca walked 4 times as far as William. Therefore, Rebecca walked 4(2)miles. Juan walked 3 more miles than Rebecca, so Juan walked 4(2)+ 3 miles.

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Juan walked 3 more miles than Rebecca. Rebecca walked 4 times as far as William.

________togetthereontime,wewalkedasfastaswecould.A、HopingB、TohopeC

Ahikerwalkedfor3days.Shewalked18milesonthefirstday,walking3miles

Inanexperiment,volunteerswalkedindividuallythroughadark,abandonedtheat

Juanwalked3moremilesthanRebecca.Rebeccawalked4timesasfarasWilliam.

Juanwalked3moremilesthanRebecca.Rebeccawalked4timesasfarasWilliam.

Marieearned$0.75foreverymileshewalkedinacharitywalkathon.Ifsheearn

Rebeccaknewthattofinishherprojectshemustovercomehertendencytoward__

[originaltext]Theworld’sfirstcompletelyautomaticrailwayhasbeenbuilt

[originaltext]W:Hello?M:Hi,Sue.(8)It’sBillParkerfromyourcalculusclas

→Mammalsandbirdsgenerallymaintainbodytemperaturewithinanarrowrange

A.乳白蛋白、SIgA含量多 B.含酪蛋白多，糖少 C.叶酸与维生素B含量少

硫酸镁抗惊厥的机制是A.降低血钙的效应 B.升高血镁的效应 C.升高血

在下列类型的反应中，加入磁性微粒为固相载体包被抗原（抗体）的是A.直接化学发光免

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