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faltersainse [42]
2 years ago
6

Y=6x-11 -2x-3y=-7 please help and hurry please

Mathematics
1 answer:
Vadim26 [7]2 years ago
3 0

Step-by-step explanation:

Solve by substitution (Assumption)

Given:

[1] y = 6x - 11

[2] -2x-3y = -7

Using [1] substitute  (6x-11) for y in [2]

[3] -2x-18x+33=-7

Simplifying

[4] 20x=40

[5] x = 2

Using [5] substitute 4 for x in [1]

[6] y= 12 - 11

[7] y = 1

Solution is (x,y)=(2,1)

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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
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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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3 years ago
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Jeff is 15 years from retiring. He opens an account at the First American Bank. He plans to deposit $1,406.14 each month into th
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Answer:

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