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RoseWind [281]
3 years ago
5

a typical marathon is 26.2 miles Aleexis averages 12 km per 1 hour when running in marathons. Use dimensional Analysis to determ

ine how long it would take Aleexis to complete a marathon
Mathematics
1 answer:
yanalaym [24]3 years ago
5 0
3 hours and 51 minutes
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Hoochie [10]
If you had values instead of algebraic expressions, you would find the area of the patio and subtract that from the area of the yard. Even though you don't have values, you can still find the area and subtract by expanding and simplifying:
(8x + 2)(6x + 3)
8x × 6x = 48x²
8x × 3 = 24x
2 × 6x = 12x
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So you get 48x² + 36x + 6 as your area of the yard

(x + 5)(3x + 1)
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So the area of the patio is 3x² + 16x + 5

(48x² + 36x + 6) - (3x² + 16x + 5)
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36x - 16x = 20x
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So your answer is D. 45x² + 20x + 1. I hope this helps!

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3 years ago
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You need to find circumference, so you would multiply the diameter by pi. So your answer is 212pi feet or 666.02 feet
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