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3 years ago

Could someone please help ;(

Mathematics

2 answers:

Iteru [2.4K]3 years ago

7 0

Answer:

a. 25/33

b. 36

c. 1/15

d. 35/12

e. 19/12

grandymaker [24]3 years ago

7 0

Pls I need to answer someone I need to ask this question

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What is the value of X? (giving brainliest and thanks to all!)

Jlenok [28]

Answer:

I believe it is A

Step-by-step explanation:

I dont quite remember the formula, but I belive that 30 would be correct because if im remembering correctly the formulas are "a + b = c" and "c - (a/b) = (a/b)

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3 years ago

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avanturin [10]

Answer:

3/9

Step-by-step explanation:

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3 years ago

According to a recent study, 1 in every 10 women has been a victim of domestic abuse at some point in her life. Suppose we have

vitfil [10]

Answer:

The probability that more than 22 of the women sampled have not been the victim of domestic abuse is P=0.537.

Step-by-step explanation:

This problem can be modeled by a binomial random variable.

The probability p can be calculated as the proportion of women that <em>has not</em> been a victim of domestic abuse at some point in her life:

$p=1-\dfrac{X}{n}=1-\dfrac{1}{10}=1-0.1=0.9$

The sample size is n=25.

We want to calculate the probability that more than 22 of the women of the sample have not been victim of domestic abuse.

The probability that exactly k women have not been victim of domestic abuse can be calculated as:

$P(x=k) = \dbinom{n}{k} p^{k}(1-p)^{n-k}\\\\\\P(x=k) = \dbinom{25}{k} 0.9^{k} 0.1^{25-k}\\\\\\$

Then, the probability that more than 22 of the women sampled have not been the victim of domestic abuse is:

$P(x>22)=P(x=23)+P(x=24)+P(x=25)\\\\\\P(x=23) = \dbinom{25}{23} p^{23}(1-p)^{2}=300*0.089*0.01=0.266\\\\\\P(x=24) = \dbinom{25}{24} p^{24}(1-p)^{1}=25*0.08*0.1=0.199\\\\\\P(x=25) = \dbinom{25}{25} p^{25}(1-p)^{0}=1*0.072*1=0.072\\\\\\\\P(x>22)=0.266+0.199+0.072=0.537$

4 0

3 years ago

What are the coordinates of the point on the directed line segment from (−6,8) to (6,−7) that partitions the segment into a rati

Maslowich

Answer:

(2, -2)

Step-by-step explanation:

The difference of coordinates is ...

(6, -7) -(-6, 8) = (12, -15)

The point of interest is located 2/(2+1) = 2/3 of this distance from the first point. So, the point of interest is ...

first point + 2/3 distance

= (-6, 8) + (2/3)(12, -15)

= (-6, 8) + (8, -10)

= (2, -2)

_____

In symbolic terms, the point P that is 2/3 of the distance from A to B is ...

P = A + (2/3)(B -A) = (1/3)A +(2/3)B

P = (A +2B)/3

Filling in the coordinate values, we find ...

P = ((-6, 8) +2(6, -7))/3 = (-6+12, 8-14)/3 = (6, -6)/3

P = (2, -2)

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4 years ago