2. 外语
  3. Marie earned $0.75 for every mile she walked in a charity walkathon. If she earned a total of $18.00 at that rate, how many mile

Marie earned $0.75 for every mile she walked in a charity walkathon. If she earned a total of $18.00 at that rate, how many mile

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问题 Marie earned $0.75 for every mile she walked in a charity walkathon. If she earned a total of $18.00 at that rate, how many miles did she walk?
选项 A、13.5
B、17.5
C、21
D、22.5
E、24
答案E
解析 You can translate the given information into an algebraic equation. If Marie walks m miles, she earns 0.75m dollars. Since you know that she earned a total of $18, you get 0.75m =18. Solving for m, you have m =18/0.75= 24. Thus the correct answer is Choice E.
This explanation uses the following strategy.
Strategy 1: Translate from Words to an Arithmetic or Algebraic Representation
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