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Nikolay [14]
2 years ago
13

What is the value of x when 1/3x = 9 1/2​

Mathematics
1 answer:
horrorfan [7]2 years ago
3 0

I'll help.

\frac{1}{3}x = 9 \frac{1}{2}

x = ?

↓

\frac{1}{3} x =  \frac{19}{2}

x =  \frac{57}{2}

"How it can be 57 ?"

The number 19 is multiplied by the number 3 at the bottom left.

19 × 3 = 57.

You might be interested in
If you have 3 apples and you take away 2 how many apples do you have now
UNO [17]

Answer:

1 apple

Step-by-step explanation:

3-2=1

But if you want to be Technical You still have 3. Because you took them away so you still have what you started with.

but the answer is 1 apple. 193 IQ

4 0
2 years ago
Shear strength measurements for spot welds have been found to have standard deviation 1 0 pounds per square inch (psi). If 100 t
Temka [501]

Answer:

P(\mu -1< \bar X

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".  

Let X the random variable that represent the Shear strength of a population, and for this case we know the distribution for X is given by:

X \sim N(\mu,10)  

Where \mu and \sigma=10

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

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

On this case  \bar X \sim N(\mu,\frac{10}{\sqrt{100}})

We are interested on this probability

P(\mu -1

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\mu -1

=P(\frac{\mu -1-\mu}{\frac{10}{\sqrt{100}}}

And we can find this probability on this way:

P(-1

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-1

5 0
3 years ago
IT'S URGENT!!
marissa [1.9K]
The area would be 162
7 0
3 years ago
letters cost $1 each to send in the mail and packages cost $5 each the equation x + 5y = 25 describes how many letters and packa
Vlada [557]

Answer:

y is the packages in the equation

4 0
3 years ago
The height of a women in the united states are normally distributed with a mean of 64 inches and a standard deviation of 2.75 in
Tatiana [17]

Answer:

The area under the curve that represents the percent of women whose heights are at least 64 inches is 0.5.

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, or the area under the curve representing values that are lower than x. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X, which is the same as the area under the curve representing values that are higher than x.

In this problem, we have that:

\mu = 64, \sigma = 2.75

Find the area under the curve that represents the percent of women whose heights are at least 64 inches.

This is 1 subtracted by the pvalue of Z when X = 64.

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

Z = \frac{64 - 64}{2.75}

Z = 0

Z = 0 has a pvalue of 0.5.

1 - 0.5 = 0.5

The area under the curve that represents the percent of women whose heights are at least 64 inches is 0.5.

5 0
2 years ago
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