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4 years ago

Please show step by step I don’t know how to do this

Mathematics

1 answer:

Pepsi [2]4 years ago

3 0

Answer:

4=1

Step-by-step explanation:

2(n + 2) = 4n + 1 - 2n

2n + 4 =4n - 2n + 1

2n + 4 = 2n + 1

2n-2n+4=2n-2n+1

0+4=0+1

4=1

idk if this is right myself but this is want i found on internet, i searched it up for 1 hour and this is the ans they gave me...

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What is the equation of the line between (-1,7) and (2, 15).

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3 years ago

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Ksivusya [100]

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3 years ago

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Norma-Jean [14]

Answer:

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Step-by-step explanation

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7 0

4 years ago

Read 2 more answers

The National Center for Health Statistics (NCHS) reports that 70%70% of U.S. adults aged 6565 and over have ever received a pneu

Marianna [84]

Answer:

11.44% probability that exactly 12 members of the sample received a pneumococcal vaccination.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they received a pneumococcal vaccination, or they did not. The probability of an adult receiving a pneumococcal vaccination is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

70% of U.S. adults aged 65 and over have ever received a pneumococcal vaccination.

This means that $p = 0.7$

20 adults

This means that $n = 20$

Determine the probability that exactly 12 members of the sample received a pneumococcal vaccination.

This is P(X = 12).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 12) = C_{20,12}.(0.7)^{12}.(0.3)^{8} = 0.1144$

11.44% probability that exactly 12 members of the sample received a pneumococcal vaccination.

3 0

3 years ago