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2 years ago

I really need help ‼️

Mathematics

2 answers:

rewona [7]2 years ago

6 0

C and f if not that than b and d

Sloan [31]2 years ago

5 0

and 19

Hope this helps ya'll

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3 years ago

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What is he slope and y intercept for the line Y=-4x+2

Sav [38]

y=mx+b

slope is also m

b is the y-intercept

Y=-4x+2

answer:

slope=-4, y-intercept=2

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2 years ago

Carey bought 8 tickets for $52 how many tickets could she buy for $90?

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73.13

Step-by-step explanation:

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3 years ago

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What numbers can I divide that will give me a quotient that’s is greater than 20 but less than 25.

cluponka [151]

Answer:

42 divided by 2

Step-by-step explanation:

That will give you 21.

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2 years ago

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A scientist inoculates mice, one at a time, with a disease germ until he finds 3 that have contracted the disease. If the prob

UkoKoshka [18]

Answer:

The probability that 8 mice are required is 0.2428.

Step-by-step explanation:

Given : A scientist inoculates mice, one at a time, with a disease germ until he finds 3 that have contracted the disease. If the probability of contracting the disease is two sevenths.

To find : What is the probability that 8 mice are required? The probability that that 8 mice are required is nothing ?

Solution :

Applying binomial distribution,

$P(X=r)=^nC_r p^rq^{n-r}$

Where, p is the probability of success $p=\frac{2}{7}$

q is the probability of failure q=1-p, $q=1-\frac{2}{7}=\frac{5}{7}$

n is total number of trials n=8

r=3

Substitute the values,

$P(X=3)=^8C_3 (\frac{2}{7})^3 (\frac{5}{7})^{8-3}$

$P(X=3)=\frac{8!}{3!5!}\times \frac{8}{343}\times (\frac{5}{7})^{5}$

$P(X=3)=\frac{8\times 7\times 6}{3\times 2\times 1}\times \frac{8}{343}\times \frac{3125}{16807}$

$P(X=3)=0.2428$

Therefore, the probability that 8 mice are required is 0.2428.

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3 years ago