Use substitution to solve the linear system of equations. 5x - y = 15 -10x + 2y = -30
1 answer:
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Answer:
a=8.182 and b=8
Step-by-step explanation:
Weight of the Empire State Building = pounds.
Weight of the One World Trade Center building= 88,200,000 pounds.
=
The addition of the two:
Comparing with the form:
a=8.182 and b=8
Answer:
The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 9.8 - 0.2 = 9.6 reproductions per hour.
The upper end of the interval is the sample mean added to M. So it is 9.8 + 0.2 = 10 reproductions per hour.
The 99% confidence interval for the true mean number of reproductions per hour for the bacteria is between 9.6 and 10.