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Marysya12 [62]
3 years ago
5

Solve for x: (x+4)/2 - 7 x= 3. x = 5 x = 6 x = 10​

Mathematics
1 answer:
lutik1710 [3]3 years ago
7 0

Answer:

x-10/2

Step-by-step explanation:

I think this is what you are asking.

I'm sorry if its wrong.

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One hundred items are simultaneously put on a life test. Suppose the lifetimes
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Answer:

a) \mathrm{E}[\mathrm{T}]=\sum_{\mathrm{H}}^{5} \frac{200}{101-i}

b) \mathrm{Var}[\mathrm{T}]=\sum_{k=1}^{5} \frac{(200)^{2}}{(101-i)^{2}}

Step-by-step explanation:

Given:

The lifetimes of the individual items are independent exponential random variables.

Mean = 200 hours.

Assume, Ti be the time between ( i-1 )st and the ith failures. Then, the T_{i} are independent with \mathrm{T}_{\mathrm{i}} being exponential with rate \frac{(101-i)}{200} .

Therefore,

a) E[T]=\sum_{i=1}^{5} E\left[\tau_{i}\right]

=\sum_{i=1}^{5} \frac{200}{101-i}

\therefore \mathrm{E}[\mathrm{T}]=\sum_{\mathrm{H}}^{5} \frac{200}{101-i}

b)

The variance is given by, \mathrm{Var}[\mathrm{T}]=\sum_{i=1}^{5} \mathrm{Var}[T]

\therefore \mathrm{Var}[\mathrm{T}]=\sum_{k=1}^{5} \frac{(200)^{2}}{(101-i)^{2}}

7 0
3 years ago
Can someone please help???
klemol [59]

Answer:

2/3

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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