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3 years ago

De -{3X+8-[-15+6X-(-3X+2)-5X+4]-29}=-5

Mathematics

1 answer:

lianna [129]3 years ago

8 0

X = -13 :)

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xz_007 [3.2K]

Answer:

48.75

Step-by-step explanation:

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3 years ago

I need to know the answers and explanation

Ne4ueva [31]

Answer:

1) 5x+8

2)idk

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4 years ago

It takes 5 men 12 days ro complete a job how many days does it take 3 men to complete the job

ss7ja [257]

Answer:

5=12

3=? then Criss cross it and you will get 12*3 divided by 5 then you get 7.2

so the answer will be 7 days

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3 years ago

3.- In a certain desert region the average number of persons who become seriously ill each year from eating a certain poisonous

Naily [24]

Answer:

$P(X\geq 5)=1-P(X$

Using the pmf we can find the individual probabilities like this:

$P(X=0)=\frac{e^{-6.4} 6.4^0}{0!}=0.001662$

$P(X=1)=\frac{e^{-6.4} 6.4^1}{1!}=0.010634$

$P(X=2)=\frac{e^{-6.4} 6.4^2}{2!}=0.034029$

$P(X=3)=\frac{e^{-6.4} 6.4^3}{3!}=0.072595$

$P(X=4)=\frac{e^{-6.4} 6.4^4}{4!}=0.116151$

And replacing we got:

$P(X \geq 5) =0.76493$

Step-by-step explanation:

Previous concepts

Let X the random variable that represent the number of people that will become sereiosly ill in two years. We know that $X \sim Poisson(\lambda)$

The probability mass function for the random variable is given by:

$f(x)=\frac{e^{-\lambda} \lambda^x}{x!} , x=0,1,2,3,4,...$

And f(x)=0 for other case.

For this case the value for $\lambda$ would be:

$\lambda = 3.2 \frac{ills}{year} *2 years = 6.4$

For this distribution the expected value is the same parameter $\lambda$

$E(X)=\mu =\lambda$

On this case we are interested on the probability of having at least two chocolate chips, and using the complement rule we have this:

$P(X\geq 5)=1-P(X$

Using the pmf we can find the individual probabilities like this:

$P(X=0)=\frac{e^{-6.4} 6.4^0}{0!}=0.001662$

$P(X=1)=\frac{e^{-6.4} 6.4^1}{1!}=0.010634$

$P(X=2)=\frac{e^{-6.4} 6.4^2}{2!}=0.034029$

$P(X=3)=\frac{e^{-6.4} 6.4^3}{3!}=0.072595$

$P(X=4)=\frac{e^{-6.4} 6.4^4}{4!}=0.116151$

And replacing we got:

$P(X \geq 5) =0.76493$

7 0

3 years ago

Read 2 more answers

19. ERROR ANALYSIS Describe and correct the error

Alex17521 [72]

Answer:

34%

Step-by-step explanation:

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4 years ago