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e-lub [12.9K]
3 years ago
10

What is the factored expression of x^2+8x+7

Mathematics
1 answer:
melamori03 [73]3 years ago
7 0

Answer:

Factor the following:

x^2 + 8 x + 7

The factors of 7 that sum to 8 are 7 and 1. So, x^2 + 8 x + 7 = (x + 7) (x + 1):

Answer:  (x + 7) (x + 1)

Step-by-step explanation:


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Answer:

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For this case we can use the probability mass function and we got:

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Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

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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!}  

Solution to the problem

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

X \sim Binom(n=15, p=0.25)

For this case we can use the probability mass function and we got:

P(X= 5) = (15C5) (0.25)^{5} (1-0.25)^{15-5}= 0.165

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