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babymother [125]
3 years ago
9

A teacher asks students to list the math lessons they learned on nine random school days in the past month. She evaluates the st

udents’ performance on this assignment to get a general picture of how well students are taking notes. This teacher’s method is an example of systematic random sampling. simple random sampling. convenience sampling. stratified sampling.
Mathematics
2 answers:
leonid [27]3 years ago
5 0

This teacher’s method is an example of - simple random sampling.

Simple random sampling or abbreviated to SRS can be defined as a 'n' size  sample; consisting of 'n' individuals. These samples are chosen from a population in such a way that every set of individuals gets an equal chance get selected for being a sample.

Fittoniya [83]3 years ago
4 0
Simple random sampling.
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What I did was find the area of the figure as if it were a regular square.
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Then I find the area of the cut out piece, which happens to be a right triangle.
Area = 1/2(length x width)
Base/width = 20 - 14
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Area = 1/2(28)
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Now subtract
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viktelen [127]

Answer:

6(x + 9) (x + 9)

or

6 (x+9)^{2}

Step-by-step explanation:

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so:

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factors to:

(x + 9) (x + 9)

because:

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So:

It factors completely too:

6(x + 9) (x + 9)

or

6 (x+9)^{2}

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