3 years ago

Which statements are true about polygons? Select three options.

Mathematics

1 answer:

Assoli18 [71]3 years ago

5 0

Answer:

A polygon is any 2-dimensional shape formed with straight lines.

Step-by-step explanation:

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5* $\sqrt{3}$

Step-by-step explanation:

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Question 4 of 10

soldi70 [24.7K]

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d. y=5x-3

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m= slope

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so, m=5 and b= -3

Substitute with those values and then you have the equation.

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3 years ago

the mgf of a random variable x is e^3(e^t-1). Find P[mean - standard deviation squared < X < 1/2( mean + standard deviatio

postnew [5]

The given MGF is that for a random variable following a Poisson distribution with parameter $\lambda=3$ .

This means $\mathbb E(X)=\mathbb V(X)=\lambda$ , and $X$ has PMF

$f_X(x)=\begin{cases}\dfrac{3^xe^{-3}}{x!}&\text{for }x\ge0\\0&\text{otherwise}\end{cases}$

So, the desired probability is

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This is equivalent to

$\displaystyle\sum_{x=0}^2\mathbb P(X=x)=\sum_{x=0}^2\frac{3^x}{x!e^3}=\frac{17}{2e^3}\approx0.4232$

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4 years ago