Evaluate 150 -(2 + 2)^3.

Mathematics

2 answers:

RUDIKE [14]3 years ago

7 0

Answer:

Step-by-step explanation:

ASHA 777 [7]3 years ago

4 0

Answer:

Step-by-step explanation:

Let's first focus on the Parenthesis (following PEMDAS).

2+2=4

-4^3 = -64

150-64 = 86

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

First, for each point(x, y), we need to calculate x², y² and xy .

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(Please refer to the attached image for the table )

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$r= \frac{n(\Sigma xy)-(\Sigma x)(\Sigma y)}{\sqrt{[n\Sigma x^2-(\Sigma x)^2][n\Sigma y^2-(\Sigma y)^2]}}\\ \\ r=\frac{7(1480)-(44)(183)}{\sqrt{[7(362)-(44)^2][7(6575)-(183)^2]}}\\ \\ r=\frac{10360-8052}{\sqrt{(598)(12536)}}\\ \\ r=\frac{2308}{\sqrt{7496528}}\\ \\ r=0.84$