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3 years ago

6

A right angled triangle has sides 3 cm and 8cm respectively less than its hypotenuse. Find the lenght of hypotenuse to nearest m

ilimeter

1 answer:

NeTakaya3 years ago

3 0

3cm= 30mm
8cm= 80mm

c^2 = a^2 + b^2
= 30^2 + 80^2
= 7300
c= square root of 7300
= 85.44003745
= 85mm

Hope this helps!

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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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