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kondaur [170]
3 years ago
13

Find the sum of the equation. 1000x+250x=?

Mathematics
2 answers:
lisabon 2012 [21]3 years ago
6 0

Hey there!

<h2>ANSWER: 1250x</h2><h2>EXPLANATION: </h2>

To solve, you can just add 1000 + 250 and remove x.

1000+250=1250

Now add x.

1250x

1000x+250x=1250x(ANSWER)

Hope this helps!

-TestedHyperr

lbvjy [14]3 years ago
4 0

Answer:

1250x

Step-by-step explanation:

all you have to do is add them both together.

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A small town has 2000 families. The average number of children per family is mu = 2.5, with a standard deviation sigma = 1.7. A
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Answer:

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\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And for this case the standard error would be:

\sigma_{\bar X} = \frac{1.7}{\sqrt{64}}= 0.2125

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

Solution to the problem

Let X the random variable that represent the number of children per fammili of a population, and for this case we know the following info:

Where \mu=2.5 and \sigma=1.7

We select a sample of n =64 >30 and we can apply the central limit theorem. From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And for this case the standard error would be:

\sigma_{\bar X} = \frac{1.7}{\sqrt{64}}= 0.2125

6 0
3 years ago
What is a possible value of sin(theta) when cos2(theta)=0.73?
Sindrei [870]
We use the following trigonometric identity to answer the question:
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zhannawk [14.2K]

Answer: 19

Step-by-step explanation:

5 0
3 years ago
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andrew11 [14]

We have the equation:

-7p(p+8)=21

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Then we need to factor this. So we end up with:

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The correct answer is the second option

8 0
3 years ago
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