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anonymous

  • one year ago

Please Help will give medal! Frankie can build a speaker box in 120 minutes. Tisha can build a speaker box 40 minutes faster. If they work together, how many minutes does it take them to build the speaker box?

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  1. anonymous
    • one year ago
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    I think it's B

  2. ♪Chibiterasu
    • one year ago
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    There are no options but ok: x/120 +x/40 =1 x +3x =120 4x=120 x=30 minutes \[\frac{ x }{ 120 } + \frac{ x }{ 40 } = 1\] x + 3x = 120 4x = 120 x = ?

  3. anonymous
    • one year ago
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    x = 30

  4. ♪Chibiterasu
    • one year ago
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    Yeah.

  5. anonymous
    • one year ago
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    It's not one of the choices, I'm confused.

  6. anonymous
    • one year ago
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    anyone? please help?

  7. anonymous
    • one year ago
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    @Hi-xx @hughfuve @pandaecat @bruno102 @gabbimanges17 @The_Yee_Dinosaur @ctwatson @ximevazq @dwoodruff

  8. Hero
    • one year ago
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    1. The amount of time it will take when they work together will be less than the time it takes Tisha to do it alone. 2. To find the time it takes for Frankie and Tisha to build the speaker together, let F = the time it takes Frankie to build the speaker alone T = the time it takes Tisha to build the speaker alone Then input those values into the following expression: \[\dfrac{F \times T}{F + T}\] and then evaluate the expression.

  9. anonymous
    • one year ago
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    It's 30 but that's not the answer the choices are 40 minutes 48 minutes 80 minutes 240 minutes

  10. Hero
    • one year ago
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    If it were me, I'd pick the lowest amount. 40 could be a typo.

  11. anonymous
    • one year ago
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    Alright I'll try...

  12. anonymous
    • one year ago
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    It was wrong. :(

  13. Hero
    • one year ago
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    If that's wrong, then the other choices are more wrong.

  14. Hero
    • one year ago
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    30 is definitely the right amount of minutes.

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