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Mama L [17]
3 years ago
10

Twenty-one less than a number is seven. What is the number? 3 14. 28 147

Mathematics
2 answers:
maks197457 [2]3 years ago
4 0

Answer:

28

Step-by-step explanation:

add 7 + 21

Gnom [1K]3 years ago
4 0

Answer: the answer will be 28

Step-by-step explanation:

First you have to add 21+7 which equals to 28 and that's how I got my answer.

Please mark me brainiiest.

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The most recent poll of 50 randomly-selected members of a school club with a total of 80 members showed that 38 are planning to
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Answer with Explanation:

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Number of member randomly Selected,that is sample size used  (P) = 50 members

Number of members who are planning to vote for Talia = 38 members

Z Score for 95% confidence interval =1.96

it is given that Margin of Error ,E,of the poll using a 95% confidence interval=12%

E=\frac{Z*\sigma}{\sqrt{P}}\\\\ \frac{12}{100}=\frac{1.96 * \sigma}{\sqrt{50}}\\\\ \sigma=4.32890

Standard Deviation=4.3 (approx)

→95% confidence level for students who are planning to vote for Talia as president of the club lie between → 38 + 4.3 = 42.3 to 38 -4.3=33.7.

→So, members which will vote for Talia as president of the club lies between minimum of 33 members and maximum of 42 members.

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Step-by-step explanation:

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