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Ray Of Light [21]
2 years ago
7

Im working on reflections and I am confused on what the reflection of A would be? I'm trying to find the reflection of (0,5) ove

r the Yaxis? The rule is this: (x,y)->(-x,y) but there is no such thing as -0......so... yea thats why im confused? Or is the reflection unchanging? is A'=0,5?

Mathematics
1 answer:
Oduvanchick [21]2 years ago
7 0
Any points that lie on the line of reflection (the mirroring line) will not move. So point A = (0,5) will become A' = (0,5) staying in the same location. Anything on the y axis will stay where it is.
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Use the first three triominoes to find the missing number in the fourth triomino.
Nonamiya [84]
Answer: 28

Since we know there is a pattern of 20, 22, 24, and 26, we can see that there is a difference between each of the numbers of +2. Therefore, 26 + 2 = 28

- Hope it helps!
4 0
3 years ago
it is known that the population proton of utha residnet that are members of the church of jesus christ 0l6 suppose a random samp
Lady_Fox [76]

Answer:

0.0838 = 8.38% probability of obtaining a sample proportion less than 0.5.

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}}

Proportion of 0.6

This means that p = 0.6

Sample of 46

This means that n = 46

Mean and standard deviation:

\mu = p = 0.6

s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.6*0.4}{46}} = 0.0722

Probability of obtaining a sample proportion less than 0.5.

p-value of Z when X = 0.5. So

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

By the Central Limit Theorem

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

Z = \frac{0.5 - 0.6}{0.0722}

Z = -1.38

Z = -1.38 has a p-value of 0.0838

0.0838 = 8.38% probability of obtaining a sample proportion less than 0.5.

8 0
3 years ago
Which number line represents the solutions to |-2x| = 4?
Dennis_Churaev [7]
The solution to |-2x|=4 is the second number line. Pls give brainiest! :)
5 0
3 years ago
The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a me
faust18 [17]

Answer:

Almost 2.5% of the students spent more than $275 in a semester.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 235

Standard deviation = 20

According to the standard deviation rule, almost 2.5% of the students spent more than what amount of money on textbooks in a semester?

95% of the measures are within 2 standard deviation of the mean. The other 5% are more than 2 standard deviations of the mean. Since the normal distribution is symmetric, 2.5% of those are below two standard deviations of the mean and 2.5% are more than two standard deviations above the mean.

235 + 2*20 = $275

Almost 2.5% of the students spent more than $275 in a semester.

4 0
3 years ago
a company lose 112 because of a shipping delay the 7 owners of the company must share the list qually.write an expression for th
Mila [183]

The expression for the earnings per person is 112/7 and the value of the expression is 7

<h3>How to write an expression for the earnings per person?</h3>

The given parameters are

Total loss = $112

Number of owners = 7

The expression for the earnings per person is represented as

Earnings per person = Total loss/Number of owners

So, we have:

Earnings per person = 112/7

<h3>How to evaluate the expression?</h3>

In (a), we have:

Earnings per person = 112/7

Divide 112 by 7

So, we have:

Earnings per person = 16

Hence, the expression for the earnings per person is 112/7 and the value of the expression is 7

Read more about expressions at:

brainly.com/question/723406

#SPJ1

3 0
1 year ago
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