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Sagot :
To determine the total number of miles walked by the person in two days, we first need to add the distances walked on Thursday and Friday.
1. Distance walked on Thursday: [tex]\(\frac{2}{3}\)[/tex] mile
2. Distance walked on Friday: [tex]\(\frac{5}{7}\)[/tex] mile
We start by converting each fraction into a decimal to facilitate addition:
[tex]\[ \frac{2}{3} \approx 0.6666666666666666 \][/tex]
[tex]\[ \frac{5}{7} \approx 0.7142857142857143 \][/tex]
Next, we add these decimal values to find the total distance:
[tex]\[ 0.6666666666666666 + 0.7142857142857143 \approx 1.380952380952381 \][/tex]
To return to fraction form and simplify, we recognize that [tex]\(1.380952380952381\)[/tex] can be written as:
[tex]\[ 1 \frac{380952380952381}{1000000000000000} \][/tex]
Which is better simplified to the fraction [tex]\( \frac{29}{21} \)[/tex].
We should convert [tex]\( \frac{29}{21} \)[/tex] to a mixed number:
[tex]\[ \frac{29}{21} = 1 \frac{8}{21} \][/tex]
Therefore, the total number of miles the person walked the dog is:
[tex]\[ \boxed{1 \frac{8}{21}} \][/tex]
Hence, the correct answer is option D: [tex]\(1 \frac{8}{21}\)[/tex].
1. Distance walked on Thursday: [tex]\(\frac{2}{3}\)[/tex] mile
2. Distance walked on Friday: [tex]\(\frac{5}{7}\)[/tex] mile
We start by converting each fraction into a decimal to facilitate addition:
[tex]\[ \frac{2}{3} \approx 0.6666666666666666 \][/tex]
[tex]\[ \frac{5}{7} \approx 0.7142857142857143 \][/tex]
Next, we add these decimal values to find the total distance:
[tex]\[ 0.6666666666666666 + 0.7142857142857143 \approx 1.380952380952381 \][/tex]
To return to fraction form and simplify, we recognize that [tex]\(1.380952380952381\)[/tex] can be written as:
[tex]\[ 1 \frac{380952380952381}{1000000000000000} \][/tex]
Which is better simplified to the fraction [tex]\( \frac{29}{21} \)[/tex].
We should convert [tex]\( \frac{29}{21} \)[/tex] to a mixed number:
[tex]\[ \frac{29}{21} = 1 \frac{8}{21} \][/tex]
Therefore, the total number of miles the person walked the dog is:
[tex]\[ \boxed{1 \frac{8}{21}} \][/tex]
Hence, the correct answer is option D: [tex]\(1 \frac{8}{21}\)[/tex].
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