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gregori [183]
3 years ago
15

Lesson Quiz How is the graph of f(x) = -3x2 -4 different from the graph of f(x) = -3x2?

Mathematics
1 answer:
Lelechka [254]3 years ago
7 0

Answer:

there are different y intercepts

Step-by-step explanation:

the y intercept of the first one is (-4) but the other is unclear, so you have to solve to find the y intercept.

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9.06

Step-by-step explanation:

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rodikova [14]

Answer:

E(X) = 4*0.2 +3*0.5+ 2*0.2 +1*0.8+ 0*0.02= 2.78

So then the best answer for this case would be:

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Step-by-step explanation:

For this case we have the following probabability distribution function given:

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B= 3.0       0.5

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The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.

If we use the definition of expected value given by:

E(X) = \sum_{i=1}^n X_i P(X_I)

And if we replace the values that we have we got:

E(X) = 4*0.2 +3*0.5+ 2*0.2 +1*0.8+ 0*0.02= 2.78

So then the best answer for this case would be:

C. 2.78

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