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3 years ago

Please find x plz help me plz

Mathematics

1 answer:

Georgia [21]3 years ago

8 0

Answer:

x=18

Step-by-step explanation:

7x+15=141

7x=141-15

7x=126

7/7=126/7

x=18

have a good day!

pls brainliest

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If Y has a geometric distribution with probability of success p, show that the moment-generating function for Y is

butalik [34]

Answer:

M₀ (t) = p / e^-t -q = p (e^-t -q) ^ -1

Step-by-step explanation:

Let the random variable Y have a geometric distribution g (y;p) = pq y-¹

The m.g.f of the geometric distribution is derived as below

By definition , M₀ (t) = E (e^ ty) = ∑ (e^ ty )( q ^ y-1)p ( for ∑ , y varies 1 to infinity)

= pe^t ∑(e^tq)^y-1

= pe^t/1- qe^t, where qe^t <1

In order to differentiate the m.g.f we write it as

M₀ (t) = p / e^-t -q = p (e^-t -q) ^ -1

M₀` (t) = pe^-t (e^-t -q) ^ -2 and

M₀^n(t) = 2pe^-2t (e^-t -q) ^ -3 - pe^-t (e^-t -q) ^ -2

Hence

E (y) = p (1-q)-² = 1/p

E (y²) =2 p (1-q)-³ - p (1-q)-²

= 2/p² - 1/p and

σ² = [E (y²) -E (y)]²

= 2/p² - 1/p - (1/p)²

= q/p²

5 0

3 years ago

What is the Derivative of x^3-2

Ghella [55]

-5 is the correct answer hope that helped you goodluck because i don’t know it lol so okay smell my butt

4 0

4 years ago

Please help!

Vitek1552 [10]

Answer:

The answer is

<h2> $\alpha = - \frac{1}{2}$ </h2>

Step-by-step explanation:

From the question

$\alpha$ is inversely proportional to $\beta$ is written as

<h2> $\alpha = \frac{k}{ \beta }$ </h2>

where k is the constant of proportionality

When

<h3> $\alpha$ = 4</h3><h3> $\beta$ = 9</h3>

Substituting the values into the formula

we have

$4 = \frac{k}{9}$

cross multiply

k = 4 × 9

k = 36

So the formula for the variation is

$\alpha = \frac{36}{ \beta } [/tex]when [tex]\beta$ = - 72

That's

$\alpha = \frac{36}{ - 72}$

Simplify

We have the final answer as

<h3> $\alpha = - \frac{ 1}{2}$ </h3>

Hope this helps you

4 0

4 years ago

Which points are on the graph of g(x) = (1/5)^x

11111nata11111 [884]

Answer:

A) The point( -1 , 5) is satisfies the given graph $g(x) = (\frac{1}{5} )^{x}$

B) The point( 3 , 1/125) is satisfies the given graph $g(x) = (\frac{1}{5} )^{x}$

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given graph

y = $g(x) = (\frac{1}{5} )^{x}$

Put the point ( -1 , 5)

Put y =5 and x =-1

$5 = (\frac{1}{5} )^{-1} = 5$

The point( -1 , 5) is satisfies the given graph

ii)

Given graph

y = $g(x) = (\frac{1}{5} )^{x}$

$\frac{1}{125} = (\frac{1}{5} )^{3} = \frac{1}{125}$

The point( 3 , 1/125) is satisfies the given graph $g(x) = (\frac{1}{5} )^{x}$

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3 years ago

A survey was done that asked people to indicate whether they preferred pool swimming or ocean swimming. The results of the surve

Leviafan [203]

I am 100% sure it is A. I did the test and it showed it was A.

Please leave a thanks.

5 0

4 years ago