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solmaris [256]
3 years ago
14

PLEASE HELP ITS URGENT. I’ll give lots of points who helps !! Please

Mathematics
2 answers:
Molodets [167]3 years ago
7 0

Answer:

D:21

Step-by-step explanation:

Use the vertical angles equation.

4x + 13 = 5x - 8

Subtract 4x from 5x.

5x - 4x = x

13 = x - 8

Add 8 on both dies.

13 + 8 = 21

x = 21

JKLM has x that equals 21.

<JKLM and <LMJK equal 97 degrees.

Hope it helped!

Citrus2011 [14]3 years ago
5 0

Answer:

The answer is D:21

Step-by-step explanation:

make sure you use the right angles in the right order when solving for your answer...

4x+13=5x-8

5x-4x=x

13=x-8

add 8 on each side

x=21

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Var (X) = 0.36

σ = 0.6

Step-by-step explanation:

Solution:-

- Denote the random variable X : is the number of red marbles that Suzan has in her hand after she selects three marbles.

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        P ( X = 2 ) : Suzan chooses 2 Red marble from the available 3 red marble and 1 green marbles.

        P ( X = 2 ) = [ 3C2*2C1 ] / all outcomes = (3*2) / 10 = 0.6

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        P ( X = 3 ) : Suzan chooses 3 Red marble from the available 3 red marble.

        P ( X = 3 ) = [ 3C3] / all outcomes = (1) / 10 = 0.1

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          X :         1                 2                3

       P (X):       0.3            0.6              0.1

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                Var ( X ) = ∑Xi^2*P(Xi) - [ E(X) ] ^2

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                σ = √Var(X)

                σ = √0.36

                σ = 0.6

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