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
andreyandreev [35.5K]
3 years ago
7

Which set of three angles could represent the interior angles of a triangle?

Mathematics
1 answer:
Tamiku [17]3 years ago
8 0

Answer: A

Step-by-step explanation:

26+51+103=180(sum of internal angle of triangle)

You might be interested in
Where is the blue dot located
Alinara [238K]
The dot is located at -1.13
5 0
3 years ago
Read 2 more answers
A 2,000-foot-long fence will be used to enclose a rectangular field that is three times as long as it is wide. What is the lengt
BartSMP [9]
I think it's another trick question and the answer is 2000.
4 0
3 years ago
Rationalise the denominator <br>​
Margaret [11]

Step-by-step explanation:

1. \frac{2 \sqrt{3} }{ \sqrt{5} }

multiply

\sqrt{5}

do both the numerator and denominater

\frac{2 \sqrt{3} }{ \sqrt{5} }   \times  \frac{ \sqrt{5} }{ \sqrt{5} }  =  \frac{2 \sqrt{15} }{ \sqrt{25} }  =  \frac{2 \sqrt{15} }{5}

8 0
3 years ago
You estimated the average rental cost of a 2 bedroom apartment in Denton. A random sample of 16 apartments was taken. The sample
Zigmanuir [339]

Answer:

The new sample size required in order to have the same confidence 95% and reduce the margin of erro to $60 is:

n=28

Step-by-step explanation:

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".  

Assuming the X follows a normal distribution  

X \sim N(\mu, \sigma=160)  

And the distribution for \bar X is:

\bar X \sim N(\mu, \frac{160}{\sqrt{n}})  

We know that the margin of error for a confidence interval is given by:  

Me=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)  

The next step would be find the value of \z_{\alpha/2}, \alpha=1-0.95=0.05 and \alpha/2=0.025  

Using the normal standard table, excel or a calculator we see that:  

z_{\alpha/2}=\pm 1.96  

If we solve for n from formula (1) we got:  

\sqrt{n}=\frac{z_{\alpha/2} \sigma}{Me}  

n=(\frac{z_{\alpha/2} \sigma}{Me})^2  

And we have everything to replace into the formula:  

n=(\frac{1.96(160)}{78.4})^2 =16  

And this value agrees with the sample size given.

For the case of the problem we ar einterested on Me= $60, and we need to find the new sample size required to mantain the confidence level at 95%. We know that n is given by this formula:

n=(\frac{z_{\alpha/2} \sigma}{Me})^2  

And now we can replace the new value of Me and see what we got, like this:

n=(\frac{1.96*160}{60})^2 =27.32

And if we round up the answer we see that the value of n to ensure the margin of error required Me=\pm 60 $ is n=28.    

5 0
3 years ago
Type the correct answer in each box.
Vilka [71]

Answer:

2x + 2y = 24

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • the product of ages of 3 children in the Collins family is 72. the sum of the ages of 3 children, the twin boys and the older si
    13·1 answer
  • Which relation is represented by the arrow diagram?
    14·2 answers
  • Which statement best describes a rotation?
    9·2 answers
  • Please write this out on a piece of paper
    8·2 answers
  • A group of 18 people ordered soup and sandwiches for lunch. Each person in the group had either one soup or one sandwich. The sa
    15·2 answers
  • HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    14·2 answers
  • Does the equation 1/2(2x + 4) = x + 3 have infinitely many solutions? Does it have exactly one solution?
    14·1 answer
  • 4
    9·1 answer
  • At Paco’s Pizza Shop, a large pizza has a diameter of 16 inches. A small pizza has a diameter of 12 inches. What is the area of
    14·1 answer
  • . Cho biểu thức A = |3x -1| - (x -7)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!