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beks73 [17]
3 years ago
5

Answer the questions to determine if events N and V

Mathematics
2 answers:
expeople1 [14]3 years ago
8 0

Answer:

P(N|V) = 0.62

P(N) = 0.59

No

Step-by-step explanation:

rusak2 [61]3 years ago
7 0

Answer:

P(N|V) = 0.62

P(N) = 0.59

Are events N and V independent events? No

Step-by-step explanation:

I just took the assignment

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The sum of the first 10 terms of an arithmetic sequence is 235 and the
Degger [83]

Answer:

             \bold{a_1 = -42.65}\\\\\bold{d=14.7}

Step-by-step explanation:

The sum of the first 10 terms of an arithmetic sequence is:

S_{10}=a_1+a_2+...+a_{10}=\dfrac{a_1+a_{10}}{2}\cdot10=\dfrac{2a_1+(10-1)d}{2}\cdot10

\dfrac{2a_1+(10-1)d}{2}\cdot10=235\\\\(2a_1+9d)\cdot5=235\\\\2a_2+9d=47

the  sum of the second 10 terms is:  a₁₁ + a₁₂+...+ a₂₀

And the sum of the first 20 terms of an arithmetic sequence is:

S_{20}=a_1+a_2+...+a_{10}+a_{11}+...+a_{20}=\dfrac{2a_1+(20-1)d}{2}\cdot10

so the  sum of the second 10 terms is:

a_{11}+a_{12}+...+a_{20}=S_{20}-S_{10}

Therefore we have:

\dfrac{2a_1+(20-1)d}{2}\cdot10-\dfrac{2a_1+(10-1)d}{2}\cdot10=735\\\\(2a_1+19d)\cdot5-(2a_1+9d)\cdot5=735\\\\2a_1+19d-(2a_1+9d)=147\\\\10d=147\\\\d=14.7

and:  

2a_1+9\cdot14.7=47\\\\2a_1+132.3=47\\\\2a_1=-85.3\\\\a_1=-42,65

3 0
3 years ago
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