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3 years ago

Which expression shows the result of applying the distributive property to −2( 1/3 x− 1/5 )

Mathematics

2 answers:

Aleks04 [339]3 years ago

8 0

-2x 1/3= -2/3
-2x -1/5= 2/5
B: -2/3x + 2/5

lutik1710 [3]3 years ago

3 0

B. -2/3x+2/5 because -2 *1/3 will equal -2/3 and -2 * -1/5 will equal 2/5 (negative negative=positive and poaitive negative = negative )

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gulaghasi [49]

Answer:

$for\ five\ hours = 300\ min$

Step-by-step explanation:

Given:

Waiting time = 5 hours.

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3 years ago

Using the linear combination method what is the solution to the system of linear equations 7x - 2y = -20 and 9x + 4y = -6

Ghella [55]

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4 years ago

The mean height of married American women in their early twenties is 64.5 inches and the standard deviation is 2.5 inches. The m

SSSSS [86.1K]

Answer:

The equation for regression line and predicting a husband's height for married couples in their early 20s

Equation: Y'=33.67+0.54*X'

Step-by-step explanation:

r=0.5

x'=64.5

Sx=2.5

y'=68.5

Sy=2.7

General regression line equation is:

Y'=a+b*X'

so the slope of the regression line is the linear correlation coefficient multiplied by the standard deviation for y' divided by the standard deviation for x'

$b=r*\frac{S_{y}}{S_{x}}\\b=0.5*\frac{2.7}{2.5}\\b=0.54$

The intercept with axis y is the mean of the decreased by the product of the slope and the mean of x

$a=y'-b*x'\\a=68.5-0.54*64.5\\a=33.67$

The equation regression line then is:

Y'=33.67+0.54*X'

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