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
babunello [35]
3 years ago
10

What is the reason for the fourth and eight steps in the proof?

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
8 0

Answer:

  so the transitive property can be invoked in step 9

Step-by-step explanation:

Without the figure, it is difficult to tell what these steps do. However, the symmetry of the proof suggests that step 4 can match step 8, and its Reason can be "deduced from steps 2 and 3."

The idea of steps 4 and 8, taken together, is to show that DC and DB are both equal to DA, so the transitive property can be invoked in step 9.

You might be interested in
Mr. Good Wrench advertises that a customer will have to wait no more than 30 minutes for an oil change. A sample of 26 oil chang
Andru [333]

Answer:

The 90% confidence interval for the population standard deviation waiting time for an oil change is (3.9, 6.3).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for the population standard deviation is:

CI=\sqrt{\frac{(n-1)s^{2}}{\chi^{2}_{\alpha/2, (n-1)}}}\leq \sigma\leq \sqrt{\frac{(n-1)s^{2}}{\chi^{2}_{1-\alpha/2, (n-1)}}}

The information provided is:

<em>n</em> = 26

<em>s</em> = 4.8 minutes

Confidence level = 90%

Compute the critical values of Chi-square as follows:

\chi^{2}_{\alpha/2, (n-1)}=\chi^{2}_{0.10/2, (26-1)}=\chi^{2}_{0.05, 25}=37.652

\chi^{2}_{1-\alpha/2, (n-1)}=\chi^{2}_{1-0.10/2, (26-1)}=\chi^{2}_{0.95, 25}=14.611

*Use a Chi-square table.

Compute the 90% confidence interval for the population standard deviation waiting time for an oil change as follows:

CI=\sqrt{\frac{(n-1)s^{2}}{\chi^{2}_{\alpha/2, (n-1)}}}\leq \sigma\leq \sqrt{\frac{(n-1)s^{2}}{\chi^{2}_{1-\alpha/2, (n-1)}}}

     =\sqrt{\frac{(26-1)\times 4.8^{2}}{37.652}}\leq \sigma\leq \sqrt{\frac{(26-1)\times 4.8^{2}}{14.611}}\\\\=3.9113\leq \sigma\leq 6.2787\\\\\approx 3.9 \leq \sigma\leq6.3

Thus, the 90% confidence interval for the population standard deviation waiting time for an oil change is (3.9, 6.3).

3 0
3 years ago
What is 5+5+5+5+5+5x6x10x20x100x1x0x5x1x0
andreyandreev [35.5K]
The answer to the problem is 25
6 0
3 years ago
Read 2 more answers
Mr.Davis drives 496 miles in eight hours. At this rate, how many miles does he drive in six hours?
Lynna [10]

Answer:

Step-by-step explanation:

496m=8h

Figure for 1 hour.

496/8=62

Now do

62x6=372m

Yes, you are correct.

3 0
3 years ago
Simplify the following
EastWind [94]
A b^3
B is x^2
I think unless you need to keep it in the fraction so x^6/x^3
6 0
3 years ago
The price of an all access take it to the fair is $42.99 before tax Roland bought the all access ticket for 40% off then he pay
solmaris [256]

Answer:  A: He payed 3 dollars in sales tax  B: He payed 27.59 for his ticket

Step-by-step explanation:

A: 42.99 + 7% = 45.99 - 42.99 + 3

B: 42.99 - 40% = 24.79 + 7% = 27.59

3 0
3 years ago
Other questions:
  • There are 4 leaves along 3 in. of an ivy vine. There are 20 leaves along 15 in. of the same vine. Which equation models the y nu
    6·2 answers
  • Angela earns x dollars an hour. On Friday, she worked 6 hours. On Saturday, she worked 8 hours. Which expression shows how much
    6·2 answers
  • Milk and cream I miss together for recipe the total volume I make use one cup with the milk contains 2% cream contains 18% bad M
    5·1 answer
  • A sporting goods store gave a free t-shirt to every 8th customer and a free water bottle to every 10th customer for a promotiona
    15·2 answers
  • Which is equal to (f+g)(4)
    9·2 answers
  • I need help please.
    12·1 answer
  • Please help me on this problem
    8·1 answer
  • Whoever answers this God Bless You!!!
    10·1 answer
  • Pls help test is due soon!!!! <br> Y+8=15<br> Y=
    14·2 answers
  • (-3,1) (-7,-2) <br> The slope is?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!