Solve the system by substitution. y = 4x + 22 y = -7x
2 answers:
Answer:
,
Step-by-step explanation:
If two items or expressions are equal to the same subject then they are equal to each other,
y = 4x + 22 and y = -7x
Using the statement at the top
<em>Subtract -7x from both sides to collect the x terms</em>
<em>Minus 22 from both sides to isolate 11x</em>
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<em>Divide both sides by 11 to isolate x</em>
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<em>Substitute x = -2 into y = -7x</em>
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So the solution is and
Hope this helps :)
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Answer:
The standard deviation is of 8.586.
Step-by-step explanation:
For each person, there are only two possible outcomes. Either they have a genetic mutation, or they do not. The probability of a person having the mutation is independent of any other person, which means that the binomial probability distribution is used to solve this question.
Binomial probability distribution
Probability of exactly x successes on n repeated trials, with p probability.
The standard deviation of the binomial distribution is:
About 9% of the population has a particular genetic mutation.
This means that
900 people are randomly selected.
This means that
Find the standard deviation for the number of people with the genetic mutation in such groups of 900.
The standard deviation is of 8.586.