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3 years ago

7x to the 2nd power when x=6

Mathematics

1 answer:

topjm [15]3 years ago

4 0

Your answer would be 252 Hope this helps

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Eurostar is a high-speed railway service connecting

Setler79 [48]

Answer:

649 trains

Step-by-step explanation:

If there are 30 seats per carriage, and there is 18 carriages per train.

You multiple 30 and 18 to get how many seats there are in a train.

30*18 is 540 seats.

To figure out how many trains would be needed to seat 350,000 passenger, you have to divide 350,000 with 540 to get how many trains would be needed.

350,000/540 is 648.1

Since the answer is 648.1 and you can't chop a train into 10 pieces, you would need 649 trains to seat 350, 000 passengers.

8 0

3 years ago

The complement of an angle is 25°. What is the measure of the angle?

Jlenok [28]

Answer:

If the complement of an angle is 25 degrees, then the measurement of the angle will be 65 degrees.

4 0

3 years ago

Forty-two divided by seven plus the quantity three divided by six

ikadub [295]

Answer:

i think its 6.5

Step-by-step explanation:

42/7 = 6

3/6 = 0.5

6+0.5=6.5

6 0

3 years ago

The average telephone bill in a locality is $70, with a standard deviation of $40. In a sample of 50 randomly selected phone con

Sever21 [200]

Using the normal distribution, there is a 0.1894 = 18.94% probability that the sample average will exceed $75.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean $\mu$ and standard deviation $\sigma$ is given by:

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

The z-score measures how many standard deviations the measure is above or below the mean.

Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

The parameters for this problem are given as follows:

$\mu = 70, \sigma = 40, n = 50, s = \frac{40}{\sqrt{50}} = 5.66$

The probability that the sample average will exceed $75 is <u>one subtracted by the p-value of Z when X = 75,</u> hence:

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

By the Central Limit Theorem

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

Z = (75 - 70)/5.66

Z = 0.88

Z = 0.88 has a p-value of 0.8106.

1 - 0.8106 = 0.1894.

0.1894 = 18.94% probability that the sample average will exceed $75.

More can be learned about the normal distribution at brainly.com/question/28096232

#SPJ1

3 0

2 years ago

PLEASE HELP ME PLEASEE

Gelneren [198K]

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Answer: A= 1 b= -8 c= -20

Explanation:

I hope this helped!

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7 0

3 years ago

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