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nadya68 [22]
3 years ago
5

SIMPLIFY THIS EXPRESSION: 2(z + 3) + 3(5 - 3z)

Mathematics
1 answer:
quester [9]3 years ago
6 0
2z+6+15-9z
-7z+21

Hope this helps
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You randomly select one card from a 52-card deckFind the probability of selecting the eight of spades or the seven of hearts
dangina [55]

Answer:

2/52

Step-by-step explanation:

Because a normal deck of cards only has one eight of spades and only one of seven of heart. So that means the probability would be 2/52. Hope you get it!

5 0
3 years ago
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Is this correct ? Please help me
NNADVOKAT [17]

Answer:

Median: 8

Minimum: 3

Maximum: 15

First quartile: 6

Third quartile: 12.5

Interquartile Range: 6.5

Outliers: none

Step-by-step explanation:

6 0
2 years ago
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
3 years ago
Find the measure of the missing angles.
ser-zykov [4K]

Answer:

F=100

E=80

D=90

Step-by-step explanation:

5 0
3 years ago
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Need help please I will give brainlist
Vlad [161]

Answer:

it is c

Step-by-step explanation:

c

6 0
2 years ago
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