What is the sum of the polynomials?

Mathematics

2 answers:

Inessa [10]3 years ago

7 0

-4x^2 - 11x + 13. :)

Nadya [2.5K]3 years ago

6 0

For this case we have the following polynomials:

$-x ^ 2 + 9\\-3x ^ 2 - 11x + 4$

Adding the polynomials we have:

$(-x ^ 2 + 9) + (-3x ^ 2 - 11x + 4)$

Rewriting we have:

$x ^ 2 (-1-3) - 11x + (9 + 4)$

Therefore, the result of the sum is:

$-4x ^ 2 - 11x + 13$

Answer:

the sum of the polynomials is:

$-4x ^ 2 - 11x + 13$

option 2

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Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .