The x-axis is the perpendicular bisector of the line segment joining the points (2,9) and (x,y). Find (x,y).
1 answer:
Answer:
(2,-9).
Step-by-step explanation:
It is given that the x-axis is the perpendicular bisector of the line segment joining the points (2,9) and (x,y).
It means x-axis is the line of reflection and (x,y) is the image of (2,9) across the x-axis.
Rule of reflection is
The point (2,-9) is the mirror image of (2,9) across the x-axis.
Therefore, the point (x,y) is (2,-9).
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Answer: 2.14 %
Step-by-step explanation:
Given : pH measurements of a chemical solutions have
Mean :
Standard deviation :
Let X be the pH reading of a randomly selected customer chemical solution.
We assume pH measurements of this solution have a nearly symmetric/bell-curve distribution (i.e. normal distribution).
The z-score for the normal distribution is given by :-
For x = 6.74
For x = 6.76
The p-value =
In percent,
Hence, the percent of pH measurements reading below 6.74 OR above 6.76 = 2.14%