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3 years ago

What is the value of two cubed?

Mathematics

2 answers:

Lelu [443]3 years ago

5 0

Answer:

the value of two cubed is 8

evablogger [386]3 years ago

3 0

Answer:

the value of 2 cube is 8

I hope it helps

have a great day

$#Liliflim$

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gulaghasi [49]

Answer:

Step-by-step explanation:

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3 years ago

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3 years ago

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3 years ago

A varies directly as b, and a =4 when b=24 write an equation that relates a and b

uysha [10]

Y=kx
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3 years ago

Using simple linear regression, calculate the trend line for the historical data. say the x axis is april = 1, may = 2, and so o

OverLord2011 [107]

Given a table of historical demand for a product as follows:

$\begin{tabular}
{|c|c|}
 &Demand\\[1ex]
April&60\\
May&55\\
June&75\\July&60\\August&80\\September&75\\
\end{tabular}$

The linear regression equation is given by

$\hat{Y}=bx+a$

where:

$b= \frac{n\Sigma xy-\Sigma x\Sigma y}{n\Sigma x^2-(\Sigma x)^2}$
and
$a= \frac{1}{n} (\Sigma y-b\Sigma x)$

We calculate the required values using the following table, where
April = 1, May = 2, and so on.

$\begin{tabular} 
{|c|c|c|c|}
X &Y&X^2&XY\\[1ex] 
1&60&1&60\\ 
2&55&4&110\\ 
3&75&9&225\\
4&60&16&240\\
5&80&25&400\\
6&75&36&450\\[1ex]
\Sigma X=21&\Sigma Y=405&\Sigma X^2=91&\Sigma XY=1,485 
\end{tabular}$

Thus,

$b= \frac{6(1,485)-21(405)}{6(91)-(21)^2} \\ \\ = \frac{8,910-8,505}{546-441} = \frac{405}{105} \\ \\ \approx3.86$

and

$a= \frac{1}{6} (405-(3.86)(21)) \\ \\ = \frac{1}{6} (405-81)= \frac{1}{6} (324) \\ \\ =54$

Therefore, the trend line for the historical data is given by $\hat{Y}=3.86x+54$

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4 years ago