1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
noname [10]
3 years ago
11

What is the value of x?​

Mathematics
1 answer:
Ivanshal [37]3 years ago
5 0
The answer is that X=25 because (3x - 15) can be moved in the position where it is a vertical angle because of the corresponding angles postulate
You might be interested in
If a plane intersects a sphere, what is the shape of the resulting cross section?
lana66690 [7]
A circle is the answer

6 0
3 years ago
Read 2 more answers
Germany, Italy, and Japan formed the Tripartite Pact in part because they:
SVETLANKA909090 [29]

Answer:

hoped to convince the United States to stay out of World War II

Explanation:

just took the quiz :)

7 0
2 years ago
3. The bill at a restaurant
meriva

Answer:

$156.86

Step-by-step explanation:

$136.40 + 15% = $20.46

$136.40 + $20.46 = $156.86

3 0
2 years ago
Read 2 more answers
A government report gives a 99% confidence interval for the proportion of welfare recipients who have been receiving welfare ben
juin [17]

Answer:

The estimation for the proportion for this case is \hat p = 0.21

And we know that the 99% confidence interval is given by:

0.21 \pm 0.045

So then the margin of error at 99% of confidence is 0.045, and the margin of error is given by this formula:

ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}  

If we decrease the confidence level this margin of error can't be higher than 0.045 so then the correct answer for this case would be:

d. 21% ± 4.8%

Because if the z value decrease from 2.58 to 1.96 not makes sense that the margin of error increase from 0.045(4.5%) to 0.048(4.8%)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

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".  

Solution to the problem

The population proportion have the following distribution  

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})  

The confidence interval would be given by this formula  

\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}  

For the 95% confidence interval the value of \alpha=1-0.95=0.05 and \alpha/2=0.025, with that value we can find the quantile required for the interval in the normal standard distribution.  

z_{\alpha/2}=1.96

For the 99% confidence interval the value of \alpha=1-0.99=0.01 and \alpha/2=0.005, with that value we can find the quantile required for the interval in the normal standard distribution.  

z_{\alpha/2}=2.58

The estimation for the proportion for this case is \hat p = 0.21

And we know that the 99% confidence interval is given by:

0.21 \pm 0.045

So then the margin of error at 99% of confidence is 0.045, and the margin of error is given by this formula:

ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}  

If we decrease the confidence level this margin of error can't be higher than 0.045 so then the correct answer for this case would be:

d. 21% ± 4.8%

Because if the z value decrease from 2.58 to 1.96 not makes sense that the margin of error increase from 0.045(4.5%) to 0.048(4.8%)

5 0
3 years ago
An architect is designing an office building with n floors that will have an FM radio antenna 15.85 m tall on its roof. Each flo
sveticcg [70]

Answer:

h=3.9x+15.85 meters

Step-by-step explanation:

Let's say that the height of the floor just before the roof to the highest point of the roof is also 3.9 m, perhaps, we have an almost flat roof

Since the FM radio antenna is fixed on top of roof, the total height is that of previous floors and the antenna

Taking the building to have x number of floors with each floor having 3.9 m height, the function of height will be

h=3.9x + 15.85 meters

8 0
3 years ago
Other questions:
  • What is the surface area of the cylinder in terms of Pi? radius is 14in and height is 18 in A. 896 pi in^2 B. 504 pi in^2 C. 392
    14·2 answers
  • Reciprocal of 10 1/2
    13·2 answers
  • Need help ASAP due in 30 minuets
    9·2 answers
  • A supermarket sells 2-kg and 4-kg bags of sugar. A shipment of 1100
    5·1 answer
  • Which of the following are maximum and minimum points of the function y= 2 cos x - 1?
    7·1 answer
  • The original price of a suit is $150. The store decides to mark up the suit 75%. What price is the store selling the suit for?
    6·2 answers
  • Determine the m m m m m
    13·1 answer
  • ANSWER CORRECT FOR BRAINLIEST
    10·2 answers
  • Free Brainly to who tells me their fav dog breed and why
    15·2 answers
  • Reabilwe is conducting an experiment in which the temperature is measured carefully. The temperature was 106°C at the end of the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!