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4 years ago

11

a man is 76 inches tall. the length from his head to his shoulders is 14 inches, and the length from his waist to his shoulders

is 30 inches. what is the length from his feet to his waist

2 answers:

Lemur [1.5K]4 years ago

7 0

Answer: 32

Step-by-step explanation:

Andreas93 [3]4 years ago

5 0

14+30=44 (from his head to his waist)
76-44=32(he is 76 inch tall so substract 44 from 76 to find the length of feet-waist)

answer is 32

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We have the equations to be:

3x+2y=26 and 6x+y=31

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So, we have:

y = 13 - 3x/2 and x = 31/6 - 1/6y

The above means that:

Bxy = -1/6 and Byx = -3/2

The correlation coefficient is then calculated as:

r^2 = Bxy * Byx

r = -1/6 * -3/2

r = 0.25

Hence, the correlation coefficient between x and y is 0.25

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We have:

Var(y) = 4

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y = 13 - 3x/2

To solve further, we make use of:

Var(y) = Var(ax + b) = a^2Var(x)

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So, we have:

Var(y) = 13^2 * Var(x)

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Var(x) = (2/13)^2

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SD(x) = 2/13

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