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anonymous

  • one year ago

Nathaniel can weld a railing in 75 minutes. Brenda can weld a railing 25 minutes faster. If they work together, how many minutes does it take them to weld the railing?

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  1. amoodarya
    • one year ago
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    \[N=\frac{1}{75} per \space \min\\B=\frac{1}{75-25}per \space \min\\N+B =\frac{1}{75}+\frac{1}{50}\\final \space answer =\frac{1}{\frac{1}{75}+\frac{1}{50}}\]

  2. anonymous
    • one year ago
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    So what is the answer if the choices are 25 minutes 30 minutes 50 minutes 150 minutes

  3. amoodarya
    • one year ago
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    1/75+1/50=1/30 so ...?

  4. anonymous
    • one year ago
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    150 is the cd...sooo hold on

  5. anonymous
    • one year ago
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    I got 5/5....

  6. anonymous
    • one year ago
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    :/

  7. anonymous
    • one year ago
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    50

  8. amoodarya
    • one year ago
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    \[\frac{1}{75}+\frac{1}{50}=\frac{1}{25}(\frac{1}{3}+\frac{1}{2})=\frac{1}{30}\\\frac{1}{\frac{1}{75}+\frac{1}{50}}=\frac{1}{\frac{1}{30}}=30\]

  9. anonymous
    • one year ago
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  10. anonymous
    • one year ago
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    Am I right?

  11. amoodarya
    • one year ago
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    yes

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