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4 years ago

11

Use the fundamental theorem of algebra to explain how many roots your expression can have. How many real roots and how many comp

lex roots are possible?
(X+12)^9.

1 answer:

natali 33 [55]4 years ago

6 0

Answer:

hi

Step-by-step explanation:

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I NEED HELP ASAP PLEASEEE !!!!!

Volgvan

Answer:

3

Step-by-step explanation:

Using Pythagorean Theorem, 3² + 4² = 5²

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3 years ago

Assume that X is a binomial random variable with n = 27 and p = 0.90. Calculate the following probabilities. (Do not round inter

Yuki888 [10]

Answer:

a) $P(X=26) = 27C26 (0.9)^{26} (1-0.9)^{27-26}= 0.1744$

b) $P(X=25) = 27C25 (0.9)^{25} (1-0.9)^{27-25}= 0.2520$

c) $P(X=25) = 27C25 (0.9)^{25} (1-0.9)^{27-25}= 0.2520$

$P(X=26) = 27C26 (0.9)^{26} (1-0.9)^{27-26}= 0.1744$

$P(X=27) = 27C27 (0.9)^{27} (1-0.9)^{27-27}= 0.0582$

And addind the values we got:

$P(X\geq 25)= P(X=25)+P(X=26)+P(X=27)=0.2520+0.1744+0.0582=0.4846$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=27, p=0.9)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

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

Part a

We want this probability:

$P(X=26)$

And we can use the probability mass function and we got:

$P(X=26) = 27C26 (0.9)^{26} (1-0.9)^{27-26}= 0.1744$

Part b

We want this probability:

$P(X=25)$

And we can use the probability mass function and we got:

$P(X=25) = 27C25 (0.9)^{25} (1-0.9)^{27-25}= 0.2520$

Part c

We want this probability:

$P(X\geq 25)= P(X=25)+P(X=26)+P(X=27)$

And we can use the probability mass function and we got:

$P(X=25) = 27C25 (0.9)^{25} (1-0.9)^{27-25}= 0.2520$

$P(X=26) = 27C26 (0.9)^{26} (1-0.9)^{27-26}= 0.1744$

$P(X=27) = 27C27 (0.9)^{27} (1-0.9)^{27-27}= 0.0582$

And addind the values we got:

$P(X\geq 25)= P(X=25)+P(X=26)+P(X=27)=0.2520+0.1744+0.0582=0.4846$

3 0

3 years ago

Andrew walks 2000 feet from his house to his office. What distance does he cover?

Paul [167]

The answer is B. 24,000 in.

4 0

3 years ago

I need help on #42 b

AlexFokin [52]

4 cars

he earns $1325/car and 5000/1325=3.7 so he needs to sell 4 cars

hope this helps!

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4 years ago

Read 2 more answers

Factor:<br> n^4- 3n^2 + 2<br><br> *example: n^2-n-2 factored would be: (n-2)(n+1)*

Tom [10]

Step-by-step explanation:

$( \: n - 1) \times (n + 1) \times \: ( {n }^{ 2 - 2)}$

4 0

3 years ago