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irakobra [83]
2 years ago
12

Nina and Jo both ran a 13 km race.

Mathematics
1 answer:
yKpoI14uk [10]2 years ago
6 0

We will see that Jo's speed, rounded to 2 digit places, is:

S =  6.42 km/h

<h3>How to get Jo's speed?</h3>

Remember that:

<em>speed = distance/time.</em>

Nina takes 2 hours and 10 minutes to finish the race, first, let's write the time in hours:

1 hour = 60 min.

Then:

10 min = (10/60) hours = 0.167 hours.

So we can write the time as:

2.167 hours.

And the distance is 13km, so her speed is:

S = 13km/2.167h = 6 km/h

The time that she takes to reach a distance of 11km (where she meets with Jo) is:

T = 11km/(6 km/h) = 1.83 hours.

Now, Jo starts 7 minutes after Nina, then the time in which he travels the 11 km is:

1.83 hours - 7 minutes.

Where:

7 min = (7min/60 min) hours = 0.117h

Then the time is:

T= 1.83h - 0.117h = 1.713 hours.

So he travels 11km in 1.713 hours, then his speed is:

S = 11km/ 1.713 hours = 6.42 km/h

If you want to learn more about speed:

brainly.com/question/4931057

#SPJ1

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Pachacha [2.7K]

Answer:

a=-13

Step-by-step explanation:

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Hope this helps :)

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Answer:

<em>B) Parallellogram </em>

Step-by-step explanation:

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Hope this helped, let me know if you need anything else ^-^

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2 years ago
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A bouncy ball is dropped such that the height of its first bounce is 5.5 feet and each successive bounce is 64% of the previous
ahrayia [7]

Answer:

  0.4 ft

Step-by-step explanation:

It can be convenient to let a spreadsheet compute the values for you. Here, we have written an explicit formula for the height of the n-th bounce:

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We have written the formula this way because we are given the height of the first bounce, not the starting height. Each bounce multiplies the height by a factor of 0.64. Then the 7th bounce will have a height of ...

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6 0
3 years ago
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Amanda [17]


M=2-(-6)/(-1)-(-2)=8
Y=8x+b
-6=8*(-2)+b
-6=-16+b
B=16-6=10
Y=8x+10

I hope my answer is help to you
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3 years ago
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Answer: This answer for this is A

Step-by-step explanation: Hope this help :D

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