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3 years ago

8

6(3c - 5d + 6) =6(3c−5d+6)=6, left parenthesis, 3, c, minus, 5, d, plus, 6, right parenthesis, equals

1 answer:

Lunna [17]3 years ago

8 0

Answer:

$18c - 30d + 36$

Step-by-step explanation:

Given

$6(3c - 5d + 6)$

Required

Expand

$6(3c - 5d + 6)$

Open bracket

$6(3c - 5d + 6) = 6*3c - 6*5d + 6*6$

$6(3c - 5d + 6) = 18c - 30d + 36$

So, the result of the expression is:

$18c - 30d + 36$

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A bivariate data set has x = 21, sx = 13, y = 55, sy = 27, and r = .88. What is the equation for the regression line of y on x?

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Answer:

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Step-by-step explanation:

Equation for regression line of y on x is given as

$\hat{y}=mx+b --- (1)$

where

$\hat{y}$ = predicted value

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$m=r\frac{S_{y}}{S_{x}}---(2)\\\\b=\bar{y}-m\bar{x}---(3)$

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$\bar{x}$ = mean value of dependent variable y = 55

Substituting these values in (2) and (3)

$m=r\frac{S_{y}}{S_{x}}\\\\m=(0.88)\frac{27}{13}\\\\m=1.83$

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Putting these values of m and b in (1)

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