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yulyashka [42]
3 years ago
12

Alice wants to prove to her parents that listening to music while she does her homework will help her get better grades. She dec

ides to ask 25 of her friends if they listen to music while they do their homework and what their grades are. She finds that her friends who have high grades also listen to music while they do their homework. She tells her parents that she has proven that listening to music while doing homework will cause her grades to improve. What mistake has Alice made?

Mathematics
1 answer:
Airida [17]3 years ago
7 0

Answer:

She did not separate her friends into different groups, and she didn't apply a treatment.

Step-by-step explanation:

Alice decides to ask 25 of her friends if they listen to music while they do their homework and what their grades are.

She finds that her friends who have high grades also listen to music while they do their homework.

She tells her parents that she has proven that listening to music while doing homework will cause her grades to improve.

First of all it cannot be proven like this way.

Secondly, she did not use a random sample, and did not separated  her friends into groups and applied treatment.

So, the answer is She did not separate her friends into different groups, and she didn't apply a treatment.

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tatuchka [14]

Answer:

1. last choice

2. first choice

Step-by-step explanation:

<h3><u>First</u><u> </u><u>Image</u></h3>

The reason why it is the last choice because when times keep going as distance also keeps increasing as well. But the last choice says that run at the end of track then turn around and run back. That means there must be a decreasing distance and a maximum value as well.

Therefore the only with max point/vertex is the absolute value which matches the last choice.

<h3><u>Second</u><u> </u><u>Image</u></h3>

First choice because the car straight forwards without any change. The car runs with a steady speed but the distance will keep changing without any change of distance.

So the answer is first choice.

6 0
3 years ago
Ryan, Jessica, and Mark each solved this system of equations. All of their answers are different. Find and explain the mistakes.
Vika [28.1K]
6x - 2y = 10
-2y = -6x + 10...reduce by dividing by -2
y = 3x - 5....slope = 3 and y int = -5

y = 3x + 2 ...slope = 3, y int = 2

These lines are parallel. Parallel lines will have the same slope, but different y int's. There is no solution to this because ur lines never intersect.

Mark's answer is correct
6 0
3 years ago
Read 2 more answers
A trip to another city is 180 miles. In miles per hour to the nearest tenth, how fast does one have to drive to average 60 mph o
irakobra [83]

Answer:

63.5

Step-by-step explanation:

If one didn't take a 10 minute break he could drive 60 mph totalling 180 minutes but since he did and 180 - 10 = 170. He/she has to drive 180 miles in 170 min. so we take so we divde 180/170 and multiply by 60. If you round it to the nearest tenth you get 63.5

7 0
3 years ago
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mylen [45]

Answer:

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Step-by-step explanation:

-25×4=-100 and -25+4=-21

6 0
3 years ago
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Studentka2010 [4]

Answer:3

Step-by-step explanation:

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3 years ago
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