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4 years ago

120% of a number is 36?

Mathematics

2 answers:

OLEGan [10]4 years ago

7 0

Answer:

120% of x = 36

1.2 * x = 36

x = 36 / 1.2 = 30

So:

120% of 30 are 36

Savatey [412]4 years ago

5 0

Answer:

Step-by-step explanation:

We have, 120% × x = 36

or,

120

100

× x = 36

Multiplying both sides by 100 and dividing both sides by 120,

we have x = 36 ×

100

120

x = 30

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Answer:

Let's assume the following data:

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Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

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So then the correlation coefficient would be r =0.974

Step-by-step explanation:

Previous concepts

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

Solution to the problem

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

Let's assume the following data

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

$r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974$

So then the correlation coefficient would be r =0.974

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