3 years ago

Which phrase represents the integer -13

Mathematics

1 answer:

igomit [66]3 years ago

4 0

Answer:

Thirteen degrees below zero

Step-by-step explanation:

Because it is the only measurement that can be described with a negative magnitude.

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If the correlation coefficient between two variables is .90, what percent of the variance is explained by this correlation

ZanzabumX [31]

Answer: 81% of the variance in dependent variable is explained by this correlation .

Step-by-step explanation:

For X = Independent variable and Y=dependent variable,

If r= correlation coefficient , then we say $r^2$ <em> </em>of the<em> </em>variance in Y is explained by Variable X.

Given: r= 0.90

$(0.90)^2= 0.81$

So, 81% of the variance in dependent variable is explained by this correlation .

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3 years ago

If f(3)=191.5 when r =0.03 for the function F(t)=pe^rt, then what is the approximate value of P?

ElenaW [278]

Answer:

A. 175

Step-by-step explanation:

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3 years ago

Read 2 more answers

X = 1 + root 2 , find the value of (x - 1/x )^3

steposvetlana [31]

Answer:

$(\sqrt{2})^3$

Step-by-step explanation:

Given the expression

$(x - \frac{1}{x} )^3$

Simplify

$(\frac{x^2-x}{x} )^3$

Given that x = 1+√2

Substitute

$(\frac{(1+\sqrt{2} )^2-(1+\sqrt{2} )}{1+\sqrt{2} } )^3\\=( \frac{1+2\sqrt{2} +2 - 1 - \sqrt{2}}{1+\sqrt{2}} )^3\\= (\frac{\sqrt{2}+2}{1+\sqrt{2}})^3 \\Rationalize\\= (\frac{\sqrt{2}-2+2-2\sqrt{2}}{1-2})^3 \\=( \frac{-\sqrt{2}}{-1})^3 \\= (\sqrt{2})^3\\ \\$