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Paladinen [302]

2 years ago

10

Which of the following is an example of a set of like terms? A. 19y, 19, y. B. 18x, -x, 21x. C. 15, 20, 25y. D. -2x, -2y, -2xy.

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1 answer:

djyliett [7]2 years ago

7 0

Answer:

B. 18x, -x, 21x

Step-by-step explanation:

They are like terms becuase you can add them.

Please give brainliest (:

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A random sample of adults were asked whether they prefer reading an e-book over a printed book. The survey resulted in a sample

djyliett [7]

Answer: $(0.10\ ,\ 0.18)$

Step-by-step explanation:

According to the empirical rule, the 95% confidence interval for the true population proportion is given by :-

$(p'-2\sigma_{p'}\ ,\ p'+2\sigma_{p'})$

Given : . The survey resulted in a sample proportion of p′=0.14, with a sampling standard deviation of σp′=0.02, who preferred reading an e-book.

Then, the 95% confidence interval for the true proportion of adults who prefer e-books will be :-

$(0.14-2(0.02)\ ,\ 0.14+2(0.02))\\\\=(0.14-0.04\ ,\ 0.14+0.04)\\\\=(0.10\ ,\ 0.18)$

Hence, the 95% confidence interval for the true proportion of adults who prefer e-books= $(0.10\ ,\ 0.18)$

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