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3 years ago

8

After running 10 miles, David drank 2 bottles of water. His brother was thirstier and drank times as much as David. What equatio

n can be used to find out how many bottles of water David's brother drank?

1 answer:

bonufazy [111]3 years ago

4 0

Answer:

4 bottles of water

Step-by-step explanation:

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First let's convert the decimal numbers to mixed numbers:

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Now, adding all the numbers, we have:

$\begin{gathered} (3+\frac{2}{5})+(3+\frac{1}{5})+(1+\frac{3}{4})+(2+\frac{1}{4})+(1+\frac{7}{10}) \\ =(3+3+1+2+1)+(\frac{2}{5}+\frac{1}{5}+\frac{3}{4}+\frac{1}{4}+\frac{7}{10}) \\ =10+(\frac{3}{5}+1+\frac{7}{10}) \\ =11+(\frac{6}{10}+\frac{7}{10}) \\ =11+\frac{13}{10} \\ =12+\frac{3}{10}=12\frac{3}{10} \end{gathered}$

So the correct option is B.

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