3 years ago

Can you guys tell me the answers I need help .

Mathematics

1 answer:

zimovet [89]3 years ago

7 0

Good luck i cant read it tho if i could read it i would help sorry

You might be interested in

What is 32.93 divided by 37

andrey2020 [161]

0.89 is your answer. Hope this helps :)

6 0

3 years ago

Read 2 more answers

Let x have a poisson distribution with a variance of 3. find p(x = 2).

RoseWind [281]

Since the variance of a Poisson distribution with rate parameter $\lambda$ is $\lambda^2$ , we know that $\lambda=\sqrt3$ . So,

$\mathbb P(X=2)=\dfrac{e^{-\sqrt3}(\sqrt3)^2}{2!}=\dfrac3{2e^{\sqrt3}}\approx0.2654$

7 0

3 years ago

A proportion question

gizmo_the_mogwai [7]

Answer:

because x,y,z are in continuous proportion

=> x/y = y/z

<=> xz = y² =>

$\frac{xz}{y} =y\\\\=>\frac{x^{3}z^{3} }{y^{3} }=y^{3}$ (1)

with (1), we have:

$x^{2}y^{2}z^{2}(\frac{1}{x^{3} }+\frac{1}{y^{3} }+\frac{1}{z^{3} })\\\\= (xyz)^{2}(\frac{1}{x^{3} } +\frac{y^{3} }{x^{3}z^{3} }+\frac{1}{z^{3} })\\\\=(xyz)^{2} (\frac{x^{3}+y^{3}+z^{3} }{x^{3}z^{3}} )\\\\=y^{2}.\frac{x^{3}+y^{3}+z^{3} }{xz} \\\\= xz.\frac{x^{3}+y^{3}+z^{3} }{xz} \\\\=x^{3}+y^{3}+z^{3}$