<span>1.) Factor the denominator into 2 expressions leaves you with:
(x-2)/(x+5)(x-2)
x-2 cancels out, you are left with 1/(x+5), excluding x=2
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Answer:
34
Step-by-step explanation:
Yeah I’m pretty sure it is a rational number
Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: 
Step-by-step explanation:
We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.
This is the combination question.
The total combinations will be: 2^7=128
Now, finding number of ways we can get exactly 4 tiles:
We will use the formula:

in our given question, n= 7, k= 4
Putting values:

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: 
Keywords: Probability
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This is the answer with explanation