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2 years ago

IF YOU ANSWER ALL OF THIS ILL MARK YOU BRAINLIST NO CAP!

Mathematics

1 answer:

Zielflug [23.3K]2 years ago

6 0

1) 4 = 16 divided by n
k + 5 = 11
x - 2 = 7
7 times a = 42
6 = 1/3 times s
r times 13 = 17
b - 5 = 16
No. It should be 24 = 8 times x
217 - x = 36
p = 8180 - 6780

Step-by-step explanation: Cause it is

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3 years ago

In 2-3 sentences describe how you use substitution to solve a system of linear equations?

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3 years ago

Please help me complete this !! 12points

Svet_ta [14]

Answer:

x1=1

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y2=5

midpoint= (x1+x2/2, y1+y2/2)=(0/2,3+5/2)=(0,4)

x1= -2

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y2=6

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x2=4

y1=4

y2=5

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x2=-4

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y2=5

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3 0

2 years ago

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

$P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....$

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

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3 years ago