Choose all the pairs of lines that are parallel.

Mathematics

2 answers:

madam [21]2 years ago

8 0

Answer:

<h2>2.lineUX and lineVY</h2><h2>3.lineVY and lineWZ</h2>

amid [387]2 years ago

6 0

The answers are:

2. Line UX and line WZ
3. Line VY and line WZ

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Suppose that the scores of a history test are normally distributed with a mean of 565 and a standard deviation of 113. a) What p

zvonat [6]

Answer:

15.39% of the scores are less than 450

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 565, \sigma = 113$