a rectangle has a width of 6 units and a length of 2x + 8 units of the area is 108 units squared what is the value of x

2 answers:

5 0

Im assuming that the 36 square units is the constant area. if so the product of the length times the width is constant note that

each side could be 9 units and the other 4 units.

but L/W = 6/6 isn't proportional to L/W = 4/9

zimovet [89]3 years ago

4 0

4 is the valew of x
i think

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Rachael got a 550 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have m

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:

$X \sim N(600,25)$