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cupoosta [38]
4 years ago
13

Sarah has run 108 miles over the last 15 days while preparing for an upcoming marathon. She ran either 6 miles a day or 8 miles

a day. During the 15 day period, how many days did Sarah run an 8 mile day? A) 6 B) 7 C) 8 D) 9 \
Mathematics
2 answers:
N76 [4]4 years ago
8 0
<span>D) 9 is the correct answer from Usatestprep.</span>
Leona [35]4 years ago
4 0

Solution:

we are given that

Sarah has run 108 miles over the last 15 days while preparing for an upcoming marathon. She ran either 6 miles a day or 8 miles a day.

we have been asked to find

During the 15 day period, how many days did Sarah run an 8 mile day?

Let she ran 8 miles for x days, it mean she ran 6 miles one each of the (15-x) days. Then we can write

8x+(15-x)6=108\\\\\text{we can simplify it as below}\\\\8x+90-6x=108\\\\2x=108-90\\\\2x=18\\\\x=9\\

Sarah run an 8 mile day for 9 days.


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vfiekz [6]

The direct variation that of the speed to the skid length implies that the speed increases as the length increases

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<h3>How to determine the speed of the skidding car?</h3>

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s = k√l

Where:

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Rewrite as:

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Substitute known values

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Read more about direct variation at:

brainly.com/question/6974617

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In a right triangle ABC, C is the right angle. What does cosB equal?
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Given that,

ABC is a right angle triangle, C is the right angle.

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