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max2010maxim [7]
3 years ago
15

Describe the proportion method for solving a percentage problem:

Mathematics
1 answer:
kvasek [131]3 years ago
8 0

<u>EXPLANATION </u>

First you will need <u>TWO</u> numbers. One being the percentage and the other being the number your trying to find the percent out of.

<u>EXAMPLE</u>

Imagine you have 130 crayons. Out of the 130 crayons you found that 15% of them were broken.

First you want too take the 15% and put it over 100, because a percentage always goes over 100. Now that you have the 15/100 you now wanna take the 130 crayons and put the variable <u>X</u> over it. Now that you have the fractions 15/100 and X/130 you want to cross multiply them to get <u>100x </u>and <u>1950</u>. For the final step your going to want to take 1950 and divide it by 100 to get your answer, <u>19.5</u>.

I hope this helped you find out the method for solving a percentage problem while using proportions.

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Step-by-step explanation:

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Each of 16 students measured the circumference of a tennis ball by four different methods, which were: A: Estimate the circumfer
almond37 [142]

Answer:

Following are the solution to the given equation:

Step-by-step explanation:

Please find the complete question in the attachment file.

In point a:

\to \mu=\frac{\sum xi}{n}

       =22.8

\to \sigma=\sqrt{\frac{\sum (xi-\mu)^2}{n-1}}

       =\sqrt{\frac{119.18}{16-1}}\\\\ =\sqrt{\frac{119.18}{15}}\\\\ = \sqrt{7.94533333}\\\\=2.8187

In point b:

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\to \sigma=\sqrt{\frac{\sum (xi-\mu)^2}{n-1}}

       =\sqrt{\frac{26.3375}{16-1}}\\\\=\sqrt{\frac{26.3375}{15}}\\\\ =\sqrt{1.75583333}\\\\ =1.3251

In point c:

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\to \sigma=\sqrt{\frac{\sum (xi-\mu)^2}{n-1}}

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In point d:

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3 years ago
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Answer:

Step-by-step explanation:

3w + 12 + 2w = 27

5w + 12 = 27

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w= 3

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3 years ago
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