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kodGreya [7K]
3 years ago
8

Problem Page

Mathematics
1 answer:
Irina18 [472]3 years ago
8 0
20.5/3.25 = 6.3 
<span>so only six with a little cloth left over</span>
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Theo can paint a fence three times as fast as his sister can. Working together, they can paint a fence in 9 hours. How many hour
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Answer:

12 hours

Step-by-step explanation:

Let Theo's siste can paint a fence in x times

Given.

Theo can paint a fence three times as fast as his sister can. Working together, they can paint a fence in 9 hours.

\frac{1}{x}+\frac{1}{3x} =\frac{1}{9}\\\frac{3+1}{3x} =\frac{1}{9} \\\frac{4}{3x}=\frac{1}{9}

Apply cross multiplication

x=\frac{9\times 4}{3}\\x=\frac{36}{3} \\x=12hours

Theo’s sister to paint the fence in 12 hours.

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2 years ago
Read 2 more answers
3.2
Varvara68 [4.7K]

Answer:

35/132.

Step-by-step explanation:

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Note: the probabilities are multiplied because the 2 events are independent.

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