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slamgirl [31]
2 years ago
8

−9x+2>18 AND 13x+15≤−4

Mathematics
2 answers:
inn [45]2 years ago
8 0

Answer:

x>\frac{16}{-9} and x ≤\frac{-19}{13}.

Step-by-step explanation:

Given  : −9x+2>18 AND 13x+15≤−4.

To find : Solve.

Solution : We have given  −9x+2>18 AND 13x+15≤−4.

For  −9x + 2 > 18 .

On subtracting both sides by 2

- 9x > 18-2

- 9x > 16.

On dividing both sides by -9.

x>\frac{16}{-9}.

For  13x + 15 ≤ −4.

On subtracting both sides by 15.

13 x ≤  -4 - 15.

13 x ≤ -19.

On dividing both sides by 13.

x ≤ \frac{-19}{13}.

Therefore, x>\frac{16}{-9} and x≤\frac{-19}{13}.

-Dominant- [34]2 years ago
3 0

Answer:

x is less than 16/9 x is greater than or equal to -19/13

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Answer:

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b) P(Y≥ μ+3*σ ) ≥ 0.90

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Step-by-step explanation:

from Chebyshev's inequality for Y

P(| Y - μ|≤ k*σ ) ≥ 1-1/k²

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k= parameter

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