(-xy) - (x6^2+2xy-3)

Mathematics

2 answers:

Igoryamba3 years ago

5 0

The answer will be -3xy - 36x + 3

Verdich [7]3 years ago

5 0

The answer to your question is: -3xy - 36x +3
I think please tell him if I’m wrong

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Can you write to me explaining this please

Mnenie [13.5K]

Answer:

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Step-by-step explanation:

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3 years ago

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valina [46]

Answer:

Z=-2

This value means that the score of Rachel 550 it's 2 deviations below the mean of the population $\mu=600$

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

$\mu=600$ represent the population mean for the Graduate Record Exam (GRE)

$\sigma=25$ represent the population standard deviation for Graduate Record Exam (GRE)

2) Solution to the problem

Let X the random variable that represent the Graduate Record Exam (GRE) of a population, and for this case we know the distribution for X is given by:

$X \sim N(600,25)$