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Sladkaya [172]
3 years ago
12

;-y=3-2x4x+2y=10 what is the answer​

Mathematics
1 answer:
pentagon [3]3 years ago
8 0
4x+2(3-2x)=10, 4x+6-4x=10, x+6=10, x=4
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a fair coin is flipped 10 times. what is the probability of getting the same number of heads and tails
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If you flip a coin one time, the probability to get a Head is

p = 1/2

The probability of not getting a head in a single toss is :

q = 1 - 1/2 = 1/2

Thus there is only one unique situation to get the same number of heads and tails : in 10 toss you need to get exactly five heads, it will means that the rest is the tails.

Now using Binomial theorem of probability, the probability of getting exactly x = 5 heads in a total of n = 10 tosses is :

P(X = 5) = \frac{10!}{5!*5!} *(\frac{1}{2})^{5} *(\frac{1}{2})^{5}≈ 0.246

So the probability of that is 24,6 %

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What is the value of x? Enter your answer in the box​
AfilCa [17]

Answer:

45

Step-by-step explanation:

Triangles equal up to 180 degrees therefore you do the following to solve this equation. So you have 80 and 55. So you add 80 to 55 and you get 135. Now you subtract 180 by 135 and that equals 45. So x=45. I will write it out as well.

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