All categories

3 years ago

Help again gonna mark soemone brainliest

Mathematics

2 answers:

vekshin13 years ago

7 0

Answer:

i think the answer is c or a

vfiekz [6]3 years ago

4 0

Answer: The answer is C

Step-by-step explanation:

Because i did that question before.

You might be interested in

Explain one way to verify that the corresponding angles of the two triangles are congruent.

Burka [1]

Answer:

C.Use the distance formula to prove that all corresponding sides of the triangles have same lengths.Therefore, the two triangles are congruent by SSS.Then , corresponding angles of the triangles are congruent by CPCTC.

Step-by-step explanation:

We have to explain one way through which we can verify that the corresponding angles of the two triangles are congruent.

A. Use the slope formula to prove that the slopes of corresponding sides are opposite reciprocals . Therefore, the corresponding angles of the triangles are congruent.

In this option we are given that by slopes formula the slopes of corresponding sides are opposite reciprocals .It means sides are perpendicular but not give any information about congruency of two triangles through which we can say corresponding angles of two triangles are congruent.Hence, it is false.

B.Use the distance formula to prove that two corresponding sides of the triangles have same lengths. Therefore, corresponding angles of the triangles are congruent by CPCTC.

In this option we are given information about only two corresponding sides of two triangles . It is not sufficient to prove that corresponding angles of two triangles are congruent.Hence, it is false.

C.Use the distance formula to prove that all corresponding sides of the triangles have same lengths.Therefore,the two triangles are congruent by SSS. Then, corresponding angles of the triangles are congruent by CPCTC.

In this option we have complete information through which we can verify that corresponding angles of two triangles are congruent.Hence, it is correct.

D.Use the distance formula to prove that two corresponding sides of the triangles have same lengths.Therefore, the two triangles are congruent by SAS.Then, all corresponding angles of the triangles are congruent.

In this option we have no complete information through which we can two triangles are congruent by SAS. Therefore, In this option explaination are not given properly.Hence , it is false.

3 0

3 years ago

A sample of 30 observations is selected from a normal population. The sample mean is 21, and the population standard deviation i

lorasvet [3.4K]

Answer:

We conclude that μ <= 20 after hypothesis testing.

Step-by-step explanation:

We are given that sample of 30 observations is selected from a normal population.

Also, Sample mean, Xbar = 21 and Population Standard deviation, $\sigma$ = 6.

Null Hypothesis, $H_0$ : μ <=20

Alternate Hypothesis, $H_1$ : μ > 20

So, Test Statistics we will use here is ;

$\frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } }$ follows standard normal, N(0,1)

Test statistics = $\frac{21 - 20}{\frac{6}{\sqrt{30} } }$ = 0.913 .

Now at 5% level of significance z % table gives the critical value of 1.6449 and our test statistics is less than this as 1.6449 > 0.913. So,we have sufficient evidence to do not reject null hypothesis or accept $H_0$ as our test statistics does not falls in the rejection region because it is less than 1.6449.

Hence we conclude after testing that Population mean, μ<=20.

8 0

3 years ago

Please help me I give you 33 points

Misha Larkins [42]

1: It is a biography because it is describing/showing an event of a persons life through someone other than that person.

2: The text includes a heading and a labeled diagram

3: It allows you to better understand exactly when the events are taking place.

4: Because the text includes a labeled timeline that shows you the events in chronological order.

Hope I could help. ^^

7 0

3 years ago

Determine the larger of two consecutive integers whose sum add to 85

Vesnalui [34]

N+(n+1) = 85. 2n+1=85, 2n=84. n=42. So the consecutive integers are 42 and 43, and the larger one is 43.

8 0

4 years ago

What geometric figure is the union of two non-collinear rays AB and AC? AC?

Jobisdone [24]

Answer:

angle bac is the answer

Step-by-step explanation:

both rays emanate from the shared point 'a', which will be the vertex of angle bac

5 0

3 years ago