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enot [183]
3 years ago
13

Marco can build a computer twice as fast as Cliff. Working together, it takes them 5 hours. How long would it have taken Marco w

orking alone?
Mathematics
1 answer:
seraphim [82]3 years ago
3 0

Answer:

7.5 hours

Step-by-step explanation:

Let Marco's speed be M

Cliff's speed be C

M = 2C

Combined speed:

M + C

2C + C = 3C

3C = W/time

3C = W/5

W = 15C

2C = 15C/time

Time = 15/2 = 7.5 hours

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Keywords: Polynomials, expressions

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