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Helga [31]
3 years ago
14

Please help me with this

Mathematics
1 answer:
Alex_Xolod [135]3 years ago
7 0

Answer:

it's an example related to your question

Step-by-step explanation:

Q. One number is 2 times a first number. A third number is 100 more than the first number. If the sum of the three numbers is 200, find the number

Answer:First number = x

One number = 2x

Third number = 100 + x

x + 2x + 100 + x = 200

Collect like terms

4x + 100 = 200

4x = 100

x = 25

First number = 25

One number = 50

Third number =125

Total= 200

Hope this helps.

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When the definition of a function involves a fraction, the function is undefined at any value that would make the denominator of
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When the definition of a function involves a fraction, the function is undefined at any value that would make the denominator of the function is; a) 0

What is an Undefined Function?

A function that is a fraction is said to be undefined when the denominator is equal to zero. If there are variables in the denominator, the point at which the expression in the denominator is zero is the point where that function is undefined.

From the question, we want to know what the value of the denominator of a fraction will be to make that fraction undefined. From the definition above, it is clear that the value would be zero.

Read more about Undefined function at; brainly.com/question/13136492

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5 0
1 year ago
A film distribution manager calculates that 9% of the films released are flops. If the manager is right, what is the probability
ioda

Answer:

0.9884 = 98.84% probability that the proportion of flops in a sample of 469 released films would be greater than 6%.

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}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

A film distribution manager calculates that 9% of the films released are flops.

This means that p = 0.09

Sample of 469

This means that n = 469

Mean and standard deviation:

\mu = p = 0.09

s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.09*0.91}{469}} = 0.0132

What is the probability that the proportion of flops in a sample of 469 released films would be greater than 6%?

1 subtracted by the p-value of Z when X = 0.06. So

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

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{0.06 - 0.09}{0.0132}

Z = -2.27

Z = -2.27 has a p-value of 0.0116

1 - 0.0116 = 0.9884

0.9884 = 98.84% probability that the proportion of flops in a sample of 469 released films would be greater than 6%.

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3 years ago
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7a+9 that’s the answer





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