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k0ka [10]
3 years ago
10

Logically, How much would it cost to build a large seven bedroom home?

Mathematics
1 answer:
wolverine [178]3 years ago
5 0
Lower like 380,000. That's what I would put.
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What I gather from the question is that X has second moment E(X^2)=81 and variance V(X) = 58, and you're asked to find the expectation and variance of the random variable Y=2X+10.

From the given second moment and variance, we find the expectation of X :

V(X) = E(X^2) - E(X)^2 \implies E(X) = \sqrt{E(X^2) - V(X)} = \sqrt{23}

Expectation is linear, so

E(Y) = E(2X+10) = 2 E(X) + 10 = \boxed{2\sqrt{23} + 10}

Using the same variance identity, we have

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Alternatively, we can use the identity

V(aX+b) = a^2 V(X) \implies V(2X+10) = 4V(X) = 232

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2 years ago
I need the answer cause this is for a grade please!!! Jamie has a rectangular room in her home with a width of 8 feet and a diag
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