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Stella [2.4K]
2 years ago
8

the measure of one side of a square is (s + 3) inches long. which pair of expressions both represent the perimeter of this squar

e
Mathematics
2 answers:
natima [27]2 years ago
7 0
<span> <span> 4(s + 3) and (s + 3) + (s + 3) + (s + 3) + (s + 3) 
Please mark brainiest if you can :)</span> </span>
Akimi4 [234]2 years ago
4 0
An expression could be 4(s+3). Hope it helps! :)
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Of the 130 students distance learning math with Mr. Bischof, 63% of them actually work through the material. Approximately, how
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82

Step-by-step explanation:

because 63% of 130 is 81.9

and since the question is asking approximately which means rounding, so you round 81.9 to get 82.  

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And that's how you get your answer.

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Identify the sampling techniques​ used, and discuss potential sources of bias​ (if any). Explain. In​ 1965, researchers used ran
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Answer:

For this case, the method used would be simple random sampling since random digit dialing assumes that all possible people in the population have the same probability of being chosen.

We may have a non-response bias, because if a selected person does not choose the phone, we have no answers to the questions and there is no data available.

We may also have under coverage bias because some people may not have a phone and in this case these people would be excluded from the study

Step-by-step explanation:

For this case is important to remember the different types of sampling methods

Simple random sampling is a method where we select a sample size n and each individual in the population are equally likely to be selected.

Stratified random sampling is a method on which we select samples from subgroups of the population usually called strata.

Convinience sampling is a method that use a random number so select the sample

Cluster sampling is a method that separates the population in natural subgroups with no intersection between them and some of the groups are selected for the sample.

For this case, the method used would be simple random sampling since random digit dialing assumes that all possible people in the population have the same probability of being chosen.

Sources of bias

We may have a non-response bias, because if a selected person does not choose the phone, we have no answers to the questions and there is no data available.

We may also have under coverage bias because some people may not have a phone and in this case these people would be excluded from the study

8 0
3 years ago
Pls help i have 15 minutes left
Anna71 [15]
It’s the last option (-6m-n+3)
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2 years ago
Read 2 more answers
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