X+9=27, so to move the nine over to the other side of the equal sign, x=27-9, x=18
Answer:
help you with what you have not put down the question so when you are ready to put down the question I am here waiting
Answer:
24
Step-by-step explanation:
4×4=16
6×4=24
the picture is being blown up ×4
√42 is an irrational number, because you cannot express the answer as a fraction (ratio), and it certainly isn't a whole number or an integer.
Answer:
A sample size of at least 87 will be needed.
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 M as such
In which 
is the standard deviation of the population and n is the size of the sample.
In this problem, we have that:
So
A sample size of at least 87 will be needed.
