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3 years ago

8

Write an equation and use it to solve for x.

1 answer:

kotykmax [81]3 years ago

4 0

Answer:

3x+2 + 6x+7 + 90 = 180

x=9

Step-by-step explanation:

Since JKL is a straight line, it equals 180

JKM + MKN + NKL = 180

3x+2 + 6x+7 + 90 = 180

Combine like terms

9x+99 = 180

Subtract 99 from each side

9x+99-99= 180-99

9x =81

Divide each side by 9

9x/9 = 81/9

x=9

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Find the probability that when a couple has children, at least one of them is a . (Assume that boys and girls are equally lik

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Answer:

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Step-by-step explanation:

Given

$n = 3$

$B \to boys$

$G \to girls$

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<em>See comment for complete question</em>

Required:

$P(At\ least\ one\ girl)$

To do this, we make use of complement rule:

$P(At\ least\ one\ girl) = 1 - P(No\ girl)$

The event that there is no girl out of the 3 children is: B B B

And the probability is:

$P(No\ Girl) = P(B) * P(B) * P(B)$

$P(No\ Girl) = 0.5*0.5*0.5$

$P(No\ Girl) = 0.125$

So:

$P(At\ least\ one\ girl) = 1 - P(No\ girl)$

$P(At\ least\ one\ girl) = 1 - 0.125$

$P(At\ least\ one\ girl) = 0.875$

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