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Alex777 [14]
3 years ago
9

Need help finding angles JK

Mathematics
2 answers:
aev [14]3 years ago
6 0

Answer:

The square root of 253.

Step-by-step explanation:

using the Pythagorean theorem, 6 squared plus JL squared equals 15 squared. Backtracking, we get that JL is the square root of 189. Now, JL squared plus 8 squared is the length of JK squared. 189 plus 64 is 253. The length of JK is thus the square root of 253.

scZoUnD [109]3 years ago
5 0

Answer:

the angle that is on the right

Step-by-step explanation:

the line from j-k

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Answer:

The expected number of men in the delegation is 0.86.

Step-by-step explanation:

Number of men = 3

Number of women = 4

A delegation of 2 is selected.

Let X be the number of men selected. So, the possible values of X are 0,1,2.

P(X=0)=\dfrac{^3C_0\times ^4C_2}{^7C_2}=\dfrac{2}{7}

P(X=1)=\dfrac{^3C_1\times ^4C_1}{^7C_2}=\dfrac{4}{7}

P(X=2)=\dfrac{^3C_2\times ^4C_0}{^7C_2}=\dfrac{1}{7}

The expected number of men in the delegation is

E(x)=0\times P(X=0)+1\times P(X=1)+2\times P(X=2)

E(x)=0\times \dfrac{2}{7}+1\times \dfrac{4}{7}+2\times \dfrac{1}{7}

E(x)=\dfrac{6}{7}

E(x)\approx 0.86

Therefore, the expected number of men in the delegation is 0.86.

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Since it is $1 per song, if he downloaded 50 songs, it would be $50 extra dollars.

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