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anonymous

  • one year ago

nnette can repair a refrigerator in 60 minutes. Liza can repair a refrigerator 20 minutes faster. If they work together, how many minutes does it take them to repair the refrigerator?

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  1. anonymous
    • one year ago
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    @satellite73

  2. mathstudent55
    • one year ago
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    Annette: 1 repair in 60 minutes In 1 minute, she does 1/60 of the repair Liza: 1 repair in 20 minutes. In 1 minute, she does 1/20 of the repair Working together, it takes them x minutes to repair the refrigerator, so in 1 minute, they do 1/x of the refrigerator repair. 1/60 + 1/20 = 1/x

  3. mathstudent55
    • one year ago
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    Solve for x.

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