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ziro4ka [17]
3 years ago
7

I have to right a statistic question would this be one Out of 60 7th graders 45 or 75% of them prefer to play sports after schoo

l
​
Mathematics
1 answer:
mina [271]3 years ago
5 0

Answer:

This really isn't a question. I can help you out with writing one.

John randomly selected 45% of seventh grade students in his school and asked them what their favorite time to play sports was. Of the students surveyed, 51 prefer to play sports after school. Based on this data, what is the most reasonable prediction of seventh graders in his entire grade?

Step-by-step explanation:

To answer my question, you would set up a proportion.

  \frac{9}{20} = \frac{51}{x}  <-- the answer to that question will will be 113.

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Yuto and Lian are at train stations 1,880 kilometers apart. Yuto boards a train heading east at an average speed of 220
Doss [256]

Answer:

1,000 km

Step-by-step explanation:

Assume that when two train pass each other, Lian has traveled x (km)

=> The time Lian has traveled when two trains pass each other is:

<em>Time = Distance/ Rate = x/ 250 (hour)</em>

As Lian and Yuto travelled from the two opposite train stations and the train stations are 1,880 km apart

=> When two train pass each other, Yuto has traveled 1,880 - x (km)

=> The time Yuto has traveled when two trains pass each other is:

<em>Time = Distance/ Rate = (1,880 - x)/220 (hour)</em>

As Lian and Yuto board at the same time, so that when two trains pass each other, the time both of them have traveled is equal

=> <em>x/ 250 = (1,880 - x)/220</em>

<em>=> 220x = 250 x (1,880 -x) </em>

<em>=> 220x = 470,000 - 250x</em>

<em>=> 470x = 470,000</em>

<em>=> x = 1,000</em>

<em />

<em>So that, </em>when two train pass each other, Lian has traveled x = 1,000 km

<em> </em>

6 0
3 years ago
Read 2 more answers
in march, veronica walked 12 miles every day. in april, she increased her daily walking distance by 10%, in may, she added 10% t
masya89 [10]

First, find what 110% of 12 is by multiplying 12 by 1.1 (13.2).

Second, find what 110% of 13.2 is by multiplying 13.2 by 1.1 (14.52).

The answer is 14.52 miles each day in May.

I hope that this helps you.

6 0
3 years ago
If x = y, y = 2 then 3x =
kenny6666 [7]

Answer:

x=y

y=x

y=2

x=2

(3)(2)

3 times 2 is 6

Step-by-step explanation:

6 0
3 years ago
Which Password is "safer?" A password made up of a five letter word, or a password made up of a seven digit number? Why??
egoroff_w [7]

Answer:

A seven digit number

Step-by-step explanation:

A password made up of digits is less likely to relate to your life (harder to guess) than a five letter word.

4 0
3 years ago
M m m m basically what does x equal i guess i dont know for 3x+4
andrey2020 [161]

Answer:

<u>x = -4/3</u>

Step-by-step explanation:

3x + 4 = 0

3x = -4

<u>x = -4/3</u>

3 0
3 years ago
Read 2 more answers
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