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alina1380 [7]
3 years ago
6

In the equation y=-2x + 3, if x = 7, what does y equal

Mathematics
1 answer:
Ahat [919]3 years ago
7 0

Answer:

-11

Step-by-step explanation:

-14+3=-11

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LuckyWell [14K]

Answer:

105 degrees

Step-by-step explanation:

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3 years ago
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Please help I dont understand ​
Katena32 [7]
The slope is 3, count from one point to o other. If you go from -2,0 up to -1,3 you go up 3 and over one so the slope is 3
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3 years ago
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New York City is the most expensive city in the United States for lodging. The mean hotel room rate is per night (USA Today, Apr
kow [346]

Answer:

P(X

Step-by-step explanation:

Assuming a mean of $204 per night and a deviation of $55.

a. What is the probability that a hotel room costs $225 or more per night (to 4 decimals)?

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".  

Let X the random variable that represent the cost per night at the hotel, and for this case we know the distribution for X is given by:

X \sim N(204,55)  

Where \mu=204 and \sigma=55

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

We are interested on this probability

P(X>225)

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>225)=P(\frac{X-\mu}{\sigma}>\frac{225-\mu}{\sigma})

=P(Z>\frac{225-204}{55})=P(Z>0.382)

And we can find this probability on this way:

P(Z>0.382)=1-P(Z

8 0
2 years ago
Please help and explain why, so that I understand.
chubhunter [2.5K]
Hello there!

The number of people in different cities should be represented on a graph as Two-dimensional. 

I'll explain why: The number of dimensions you need on a graph is equal to the number of variables that you are studying. In this case, you have two variables in the study:

1)The number of people
2)The city where they live

You'll need a two-dimensional graph with two axes in which one of the axes represents the number of people and the other axis represents the city. If you were also studying the age of those people, you'll need one more dimension to include this new variable. 

Have a nice day!
8 0
3 years ago
What decimal number does point A on the number line below represent? A vertical number line is shown from negative 2.00 to 0 to
r-ruslan [8.4K]

Answer:

-.75

Step-by-step explanation:  hope this also helps

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