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Firlakuza [10]
3 years ago
9

PLEASE HELP!!! I WILL GIVE BRAINLIEST!! 98 POINTS!! Fake answers will get reported. ONLY QUESTIONS

Mathematics
2 answers:
LenaWriter [7]3 years ago
7 0
Heya user☺☺

Y will be equal to 20

And the number will get greater.

Hope this will help☺☺
Brums [2.3K]3 years ago
5 0
1.Y=20
2. THE NUMBER GETS BIGGER
HOPE THIS HELPS AND PLEASE MARK ME AS BRAINIEST AND ADD ME AS FRIEND
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Please help me !! pls pls pls
frutty [35]

Answer:

aas congruence postulate

6 0
2 years ago
Find the mean, variance &a standard deviation of the binomial distribution with the given values of n and p.
MrMuchimi
A random variable following a binomial distribution over n trials with success probability p has PMF

f_X(x)=\dbinom nxp^x(1-p)^{n-x}

Because it's a proper probability distribution, you know that the sum of all the probabilities over the distribution's support must be 1, i.e.

\displaystyle\sum_xf_X(x)=\sum_{x=0}^n\binom nxp^x(1-p)^{n-x}=1

The mean is given by the expected value of the distribution,

\mathbb E(X)=\displaystyle\sum_xf_X(x)=\sum_{x=0}^nx\binom nxp^x(1-p)^{n-x}
\mathbb E(X)=\displaystyle\sum_{x=1}^nx\frac{n!}{x!(n-x)!}p^x(1-p)^{n-x}
\mathbb E(X)=\displaystyle\sum_{x=1}^n\frac{n!}{(x-1)!(n-x)!}p^x(1-p)^{n-x}
\mathbb E(X)=\displaystyle np\sum_{x=1}^n\frac{(n-1)!}{(x-1)!((n-1)-(x-1))!}p^{x-1}(1-p)^{(n-1)-(x-1)}
\mathbb E(X)=\displaystyle np\sum_{x=0}^n\frac{(n-1)!}{x!((n-1)-x)!}p^x(1-p)^{(n-1)-x}
\mathbb E(X)=\displaystyle np\sum_{x=0}^n\binom{n-1}xp^x(1-p)^{(n-1)-x}
\mathbb E(X)=\displaystyle np\sum_{x=0}^{n-1}\binom{n-1}xp^x(1-p)^{(n-1)-x}

The remaining sum has a summand which is the PMF of yet another binomial distribution with n-1 trials and the same success probability, so the sum is 1 and you're left with

\mathbb E(x)=np=126\times0.27=34.02

You can similarly derive the variance by computing \mathbb V(X)=\mathbb E(X^2)-\mathbb E(X)^2, but I'll leave that as an exercise for you. You would find that \mathbb V(X)=np(1-p), so the variance here would be

\mathbb V(X)=125\times0.27\times0.73=24.8346

The standard deviation is just the square root of the variance, which is

\sqrt{\mathbb V(X)}=\sqrt{24.3846}\approx4.9834
7 0
3 years ago
I seriously need help with this. I pay attention in class it's just so confusing!! I'm giving extra points. Now 15. Please tell
brilliants [131]

Answer:

D

Step-by-step explanation:

Its D because A is all 90 degrees

Not C because all 90

8 0
3 years ago
What is 57,909,000 in scientific notation?
LenaWriter [7]
Hello,

Shall we begin?

<span>57,909,000
</span>
= 5.7909 * 10 ^7


Answers: 5.7909 * 10 ^7
5 0
3 years ago
What is the simplify ratio 40:28
Simora [160]
40:28  = 10:7 simplified 
3 0
3 years ago
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