EXPLAIN AND I WILL GIVE BRAINLIEST

Mathematics

2 answers:

9966 [12]2 years ago

7 0

Answer:

(-3, 2)

Step-by-step explanation:

To find the coordinates of a point being reflected across the x-axis you need to use the rule (x, -y) on the point. Example: If the point was (4, 7) you would make the y value negative since it is positive, which would give you (4, -7) which is the point after being reflected across the x-axis. I know this one is for reflecting on the x-axis but for future problems if you want to reflect across the y-axis you do the same thing but with the x value, so (-x, y)

Anna007 [38]2 years ago

5 0

-3.2 is the answer ..

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Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 513 and a standard deviation of 82. Use

Trava [24]

Answer:

Note that we need calculate the scores between the mean ( $\mu=513$ ) and the mean plus 3 times the standard deviation. It is 3 times since the distance between the values given (513 and 759) divided by the standard deviation is 3 ( $\frac{759-513}{82}=3$ )

So the rule say that 99.7% of data is between $\mu - 3\sigma$ and $\mu + 3\sigma$ , as it is a normal distribution half of 99.7% is between $\mu$ and $\mu+3\sigma$ . Hence 49.85% of people score between 513 and 759.