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Nataly [62]
3 years ago
11

Horizontal lines are always perpendicular to _________ lines.

Mathematics
1 answer:
Viktor [21]3 years ago
6 0

Answer:

Vertical

Step-by-step explanation:

/_

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What is the slope of a line that is perpendicular to the line whose equation is 2x + y = 4
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The slope of the line of the equation given is -2 (by solving for y, you get y = -2x+4).


So, in order to be perpendicular, you must take the negative reciprocal.

The slope would be -1/2.

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You are standing at the top of the mountain 1,500 feet above sea level and your brother is a scuba diving in the ocean 10 feet b
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Heated-treated parts are specified to have a hardness of at least 45 (lower specification limit). Any parts that are below 45 ar
Nataly_w [17]

Answer:

P(X

And we can find this probability using the normal standard table or excel and we got:

P(z

The figure shows the calculation for this case.

Step-by-step explanation:

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".  

Solution to the problem

Let X the random variable that represent the hardness of a population, and for this case we know the distribution for X is given by:

X \sim N(48.5,2)  

Where \mu=48.5 and \sigma=2

We are interested on this probability

P(X

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

And we can find this probability using the normal standard table or excel and we got:

P(z

The figure shows the calculation for this case.

5 0
3 years ago
Which of the following properties does not work for addition?
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Answer:

I believe it is Identity

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Whats the 90'/, angle
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Answer:

An angle shaped as a long L is a right angle...

Step-by-step explanation:

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