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Amiraneli [1.4K]
4 years ago
14

How is 30 divided into 100 expressed as a percentage?

Mathematics
2 answers:
Ivenika [448]4 years ago
6 0
Perceent means parts out of 100
x%=x/100

30/100=30%
Nata [24]4 years ago
5 0
The correct answer is 30%. Any percentage number out of 100 is the original number. If you're having trouble remembering this, just set up a proportion like you would for any other percentage problem.

30 / 100 = x / 100   In this proportion, we're trying to find the percent out of 100 that 30 divided into 100 is. This is represented by the variable x.
3000 = 100x   Cross-multiply 30 and 100.
30 = x   Divide.

So, x, the percentage that 30 divided into 100 is out of 100, is 30, meaning that 30 is 30% of 100.

Hope this helps!
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The answer is (3,-4). On a graph you see it is right in the middle. Hope this helps.

8 0
3 years ago
Select the best answer for the question.
hoa [83]

c is the correct answer

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Determine the intercepts of the line that passes through the following points. (-5,-7) (0,-5) (5,-3)
MAVERICK [17]
To find the y intercept you use this equation:

y2 - y1

Same for x intercept:

x2 - x1

Pick two points, put in the values, and solve.

(-5,-7) and (0,-5)

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Hope this helps! :)
-Peredhel
4 0
3 years ago
I need help with 15/20
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3 years ago
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Using the simple random sample of weights of women from a data​ set, we obtain these sample​ statistics: nequals45 and x overbar
Tomtit [17]

Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : n=45

\overline{x}=148.79\text{ lb}

\sigma=31.37\text{ lb}

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = \mu=148.79\text{ lb}

b) The confidence interval for the population mean is given by :-

\mu\ \pm E, where E is the margin of error.

Formula for Margin of error :-

z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}

Given : Significance level : \alpha=1-0.90=0.1

Critical value : z_{\alpha/2}=z_{0.05}=\pm1.645

Margin of error : E=1.645\times\dfrac{31.37}{\sqrt{45}}\approx 7.69

Now, the 90% confidence interval for the population mean will be :-

148.79\ \pm\ 7.69 =(148.79-7.69\ ,\ 148.79+7.69)=(141.1,\ 156.48)

Hence, the 90​% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

3 0
3 years ago
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