How do I factorise 6-42x
2 answers:
Answer:
Step-by-step explanation:
Given: The equation .
To find: Factorize the given equation.
Solution:
The given expression is:
which can be rewritten as:
Upon solving the above expression and Taking 6 common from both the terms of the expression ,we get
which is the required factorized form of the given expression.
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Answer:
b. It will decrease by a factor of 2
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence interval
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The lower end of the interval is given by:
The upper end of the interval is given by:
The length of the interval is the subtraction of the upper end by the lower end, so it is:
This means that the length is inverse proportional to the square root of the size of the sample.
So, if the sample size is multiplied by 4, the length of the interval is going to decrease by a factor of 2.