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Irina-Kira [14]
3 years ago
7

Can someone please please help me with this question???

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
5 0

I will do this in a proof format

Statements                                     | Reasons

AE congruent BE                           |  Given

Ang. 1 congruent Ang.  2               | Given

Ang. 3 congruent ang. 4                | Vert. Ang. Thm.

Tri. ACE congruent Tri. BDE          | ASA Post.

CE congruent DE                            | CPCTC

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). Cho hệ các vector
Greeley [361]
I DONT UNDERSTAND YOUR LANGUAGE IM SORRY ILL TRY TO TRANSLATE
6 0
3 years ago
(4.23)(1.6) please multiple
Wewaii [24]

Answer:

The correct answer is 6.768.

Step-by-step explanation:

(4.23)(1.6) = 6.768

8 0
2 years ago
Read 2 more answers
A student wanted to construct a 95% confidence interval for the mean age of students in her statistics class. She randomly selec
VMariaS [17]

Answer:

19.1-3.355\frac{1.5}{\sqrt{9}}=17.42    

19.1+3.355\frac{1.5}{\sqrt{9}}=20.78    

And the best option would be:

C. [17.42,20.78]

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".

\bar X=19.1 represent the sample mean

\mu population mean (variable of interest)

s=1.5 represent the sample standard deviation

n=9 represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=9-1=8

Since the Confidence is 0.99 or 99%, the value of \alpha=0.01 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.005,8)".And we see that t_{\alpha/2}=

Now we have everything in order to replace into formula (1):

19.1-3.355\frac{1.5}{\sqrt{9}}=17.42    

19.1+3.355\frac{1.5}{\sqrt{9}}=20.78    

And the best option would be:

C. [17.42,20.78]

5 0
3 years ago
In triangle ABC, medians AD, BF, and CE intersect at G. What is the length of GE is CH=12?
sashaice [31]
You do not have any point labeled "H" in your diagram.

What I can tell you is that point "G" (where all 3 medians meet) is called a centroid.
<span>
Along </span>each<span> median:</span>
the distance from EACH vertex to the centroid (point G) is TWICE the distance from the centroid to the side.
<span>CG = 2*GE   AG = 2*GD   BG = 2*GF


</span>
6 0
2 years ago
Please help Ill give brainy pleas help please -
mars1129 [50]
The answer to this is a=3
4 0
1 year ago
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