Answer:
0.08641975308
Step-by-step explanation:
For this case we have the following system of equations:
We multiply the second equation by -1:
We add the equations:
We find the value of "x":
Thus, the solution of the system is given by:
ANswer:
(9, -8)
Answer:
B
Step-by-step explanation:
The answer is B, -12.
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-12^2 --> -144
-144+144 = 0
Therefore, the answer is B, -12.
The correct answer would be a ray
Answer:
Item (D)
Step-by-step explanation:
In the stratified random sample we would divide our population into homogeneous groups / strata and then we randomly select the individuals in each group / stratum.
In general, when comparing with the simple random sample, we realize that stratified random sampling has the advantage of increasing accuracy and decreasing variability.
In the question, we have two strata: female students and male students. On each one of the strata, a random sample of 25 names was made in the list.
