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3 years ago

6 * ? = 20. Please help it is sorta confusing

Mathematics

2 answers:

Alecsey [184]3 years ago

5 0

Imagine 20/6, or 6 times what equals 20. You will find the answer is 3.33333333333 or 3.3 repeating

sammy [17]3 years ago

4 0

<span>6 * ? = 20 is the same thing as</span> 6x = 20. When solving an equation for x, if it is multiplied by something, you divide whatever it is multiplied by from both sides.

So since x is multiplied by 6, you need to divide 6x by 6, and divide 20 by 6 6x/6 = 20/6

6x/6 = x
20/6 = 3 1/3 or 3.33

Your final answer should be x = 3 1/3 or x = 3.33 (they are the same thing)

Hope this helps you understand sorry if its still confusing I tried to make it simple.

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2 years ago

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Ne4ueva [31]

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3 years ago

Assume that women have heights that are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches.

Maurinko [17]

Answer:

Q3 = 65.7825.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 63.6, \sigma = 2.5$

Find the value of the quartile Q3. (Hint: Q3 has an area of 0.75 to its left.)

This is the value of X when Z has a pvalue of 0.75. So it is X when Z = 0.675.

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

$0.675 = \frac{X - 63.6}{2.5}$

$X - 63.6 = 0.675*2.5$

$X = 65.7825$

Q3 = 65.7825.

3 0

2 years ago

Bailey has an hour to get ready for school. She spends 3/6 of the time getting dressed. She spends 1/4 of that time eating break

Katen [24]

Well, to find out whether she spent more time getting dressed or eating breakfast, we simply have to compare the fractions of the hour that she took on each.
We know that she took 3/6 of an hour to get dressed and 1/4 of an hour to eat breakfast. To find out which activity she spent more time on, we simply need to see which fraction is bigger.
To do this, we must first reduce the fractions to lowest terms. 1/4 is already in lowest terms, so we can leave that alone. 3/6 can be reduced, however, and since 3 goes into 6 twice, it reduces to 1/2.
Now, we can compare the fractions.
Is 1/2 of an hour or 1/4 of an hour more?
The answer is 1/2, so now we know that Bailey spent more time getting dressed than eating breakfast.
Hope that helped! =)

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3 years ago

I need help with the equation.

drek231 [11]

Answer:

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Step-by-step explanation:

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2 years ago