Working alone, it would take Shandra 40 minutes to sand a table. To sand the same table, also working alone, it would take Kelly 1 hour. If

Question

Working alone, it would take Shandra 40 minutes to sand a table. To sand the same table, also working alone, it would take Kelly 1 hour. If they work together, the situation can be modeled by the following equation, where t is the time it would take to sand the table working together.
StartFraction 1 Over 0.75 EndFraction + StartFraction 1 Over 1.25 EndFraction = StartFraction 1 Over time to complete together EndFraction
Shandra claims it will take them about 50 minutes working together, because 50 is the mean of 40 and 60. Which best describes Shandra’s claim?

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Thu Hương 5 years 2021-07-31T07:57:55+00:00 2 Answers 174 views 0

Answers ( )

  1. Philomena
    0
    2021-07-31T07:59:00+00:00
    Reply

    Answer: C

    Step-by-step explanation:

    Answer:

    1/40+1/60=1/t is best describes Shandra’s claim.

    Step-by-step explanation:

    Finding average of both Shandra and Kelly working time is wrong way to find the time taken when they both work together. The correct way to find time taken when they both work together is:

    Hence, When both Shandra and Kelly are working together they take 24 minutes to complete the work.

  2. diemkieu
    0
    2021-07-31T07:59:21+00:00
    Reply

    Answer: CCCCCC

    Step-by-step explanation:

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