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Sever21 [200]
2 years ago
11

Bernard had 15 red notebooks, 17 blue notebooks and 19 white

Mathematics
2 answers:
zlopas [31]2 years ago
5 0

Answer:

He gave 46 to Tom

Step-by-step explanation:

He started is 51 notebooks- 15 + 17 + 19 = 51

He then gave some away until he only had 5 left 51 - 5 = 46

He gave 46 to Tom

IceJOKER [234]2 years ago
4 0
If you add all of the books you get 51. it’s says he had five left so subtract 5 from 51 and you get 46. he gave 46 to tom
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Answer:

a) Observational study

b) No

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Step-by-step explanation:

Hello!

An observational study is one where the investigator has no control or intervenes on it. He just defines the variable of interest and merely collects and documents the information. These types of studies are usually made as precursors to a more formal experimental study, to have an idea of what's to be expected from the population.

In this example, the researcher merely took the information of interest from the survey that was taken. The researcher did not intervene in any way in the experiment. Because of the lack of intervention from the researcher, it is not valid to use the conclusions of this experiment to generalize to all American adults. For instance, it is not sure that the sample is representative, all people responding to the survey may be healthy or have certain eating habits. This also shows that many confusing factors are not taken into account like:

-eating habits (from eating healthy to extreme cases like being vegetarian/vegan or eating only fast food)

-age, the age range is not defined, if the sample is taken from surveys answered by people in their early 20s it will be different in both eating habits and health information as if the interviewees are in their 30s or 40s

-before health issues, there can be other health conditions that may be affecting the interviewees.

I hope it helps!

5 0
3 years ago
Find the degree of the monomial. -20.5​
Nadya [2.5K]

Answer:

0

Step-by-step explanation:

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7 0
2 years ago
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Step-by-step explanation:

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monitta

Answer:

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