4 years ago

Was able to show a and b. but having issues with C.

Mathematics

1 answer:

Arada [10]4 years ago

7 0

I think it would be $81 I’m not positive tho

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Lunna [17]

Answer:

-4/5

Step-by-step explanation:

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3 years ago

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7. Which expression is a factor of x² + 2x – 15?

Lubov Fominskaja [6]

Answer:

(x-3) is the correct expression

Step-by-step explanation:

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This breaks up to (x+5)(x-3)

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3 years ago

For the following distribution,

Musya8 [376]

Answer:

Option B) 0.63

Step-by-step explanation:

We are given the following in the question:

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$E(X) = \displaystyle\sum x_iP(x_i)\\\\E(X) = 0(0.027) + 1(0.189) + 2(0.441) + 3(0.343)\\E(X) = 2.1\\\\E(X^2) = \displaystyle\sum x_i^2P(x_i)\\\\E(X^2) = 0^2(0.027) + 1^2(0.189) + 2^2(0.441) + 3^2(0.343)\\E(X^2) = 5.04\\\\Var(X) = E(X^2) -[E(X)]^2\\Var(X) = 5.04 - (2.1)^2\\Var(X) = 0.63$

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3 years ago

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