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sammy [17]
3 years ago
10

What is the answer to this equation 50x^2-32y^2/-5x-4y

Mathematics
2 answers:
kupik [55]3 years ago
7 0
I am pretty sure the answer is -10x+8y could be wrong though
LenKa [72]3 years ago
5 0
                -10x   +8y
               --------------------
-5x - 4y ) 50x^2               - 32y^2
               50x^2 + 40xy
              -----------------
                          -40xy - 32y^2
                          -40xy  -32y^2
                         -------------------

answer is -10x + 8y

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Using regression analysis the line of best fit is: y=\alpha +\beta x+e

Here <em>α </em>= intercept, <em>β</em> = slope and <em>e</em> = error.

The formula to compute the intercept is:

\alpha =\bar y-\beta \bar x

Here<em> </em>\bar y and \bar x are mean of the <em>y</em> and <em>x</em> values respectively.

\bar y=\frac{\sum y_{i}}{n} \\\bar x=\frac{\sum x_{i}}{n}

The formula to compute the slope is:

\beta =\frac{\sum (x-\bar x)(y - \bar y)}{\sum (x=\bar x)^{2}}

And the formula to compute the error is:

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The regression line can be determined using the descriptive statistics mean, standard deviation and correlation.

The equation of the line of best fit is:

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Here <em>r</em> = correlation coefficient = r=\frac{Cov (x,y)}{\sqrt{\sigma^{2}_{x}\sigma^{2}_{y}} }

\sigma_{x} and \sigma_{y} are standard deviation of <em>x</em> and <em>y</em> respectively.

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We regroup the like terms to obtain,

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