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Lostsunrise [7]
3 years ago
6

Curtis rides his bike 9 miles one way then turns around and rides back. On the return trip, his speed is increased 20% because t

he wind is at his back. Let s be his speed in miles per hour riding against the wind. What is an expression that represents his total time in hours riding there and back?
Mathematics
1 answer:
k0ka [10]3 years ago
7 0

Answer:

The expression that represents his total time is given by "t = 7.5/s" where s is his speed against the wind.

Step-by-step explanation:

In order to solve this problem we will assign a variable to Curtis speed on the first leg of the trip, this will be called "s". Since the speed on the first part is "s" and the speed on the second part is 20% higher, then the speed on the second part is "1.2s". Each leg of the course is 9 miles long, therefore the time it took to go each way is given by:

time = distance/speed

First part:

t1 = 9/s

Second part:

t2 = 9/1.2s = 7.5/s

The expression for the whole course is the sum of each, so we have:

t = t1 + t2

t = 9/s + 7.5/s

t = (9 + 7.5)/s = (16.5)/s

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The percentage form of given fraction is 60% and the hundredths form is 0.60

According to the statement

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So, For this purpose,

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Then the definition of the percentage is that

The Percentage, a relative value indicating hundredth parts of any quantity.

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After solving it, The percentage fraction will become:

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8 0
2 years ago
Help help pls answer asap
Effectus [21]

Answer:

Step-by-step explanation:

V-0.12V (first option) if we factor it it becomes

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3 0
3 years ago
Franklin is cutting a 7 1/2 foot rope into 5 equal pieces. how long will each piece of rope be?
chubhunter [2.5K]

Answer:

18 inches or 1 foot 6 inches/1 foot and a half

Step-by-step explanation:

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then half a foot is 6 inches so 84+6=90 inches

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90/5=18 inches

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5 0
2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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3 years ago
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