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makvit [3.9K]
3 years ago
15

50 is 40% of what number

Mathematics
2 answers:
g100num [7]3 years ago
8 0
50 is 40% of 125

Convert your percentage into a decimal:
40 \div 100 = 0.4

Divide 50 by your decimal:
50 \div 0.4 = 125
DENIUS [597]3 years ago
7 0
50 / 0.40 = 125

To check your answer, 125 * 0.4 = 50
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Answer:

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S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}  

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On this case the correct answer would be:

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Step-by-step explanation:

Assuming the following options:

A.  there is a positive correlation between X and Y

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If we want a model y = mx +b where m represent the lope and b the intercept

m=\frac{S_{xy}}{S_{xx}}  

Where:  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}  

\bar x= \frac{\sum x_i}{n}  

\bar y= \frac{\sum y_i}{n}  

And we can find the intercept using this:  

b=\bar y -m \bar x  

On this case the correct answer would be:

E.  none of the above

Since the intercept has no association between the increase/decrease of the dependent variable respect to the independent variable

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