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DedPeter [7]
2 years ago
6

What is x in the diagram?

Mathematics
2 answers:
Bezzdna [24]2 years ago
8 0

Answer:

the third one 6\sqrt{3}

Step-by-step explanation:

3 x 2 = 6

3 x 3 = 9

hope this helps

Brut [27]2 years ago
3 0

Answer:

C 6\sqrt{3}

Step-by-step explanation:

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Sunspots have been observed for many centuries. Records of sunspots from ancient Persian and Chinese astronomers go back thousan
Lunna [17]

Answer:

(a) Null Hypothesis, H_0 : \mu \leq 41  

    Alternate Hypothesis, H_A : \mu > 41

(b) The value of z test statistics is 1.08.

(c) We conclude that the mean sunspot activity during the Spanish colonial period was lesser than or equal to 41.

Step-by-step explanation:

We are given that in a random sample of 40 such periods from Spanish colonial times, the sample mean is x¯ = 47.0. Previous studies of sunspot activity during this period indicate that σ = 35.

It is thought that for thousands of years, the mean number of sunspots per 4-week period was about µ = 41.

Let \mu = <u><em>mean sunspot activity during the Spanish colonial period.</em></u>

(a) Null Hypothesis, H_0 : \mu \leq 41     {means that the mean sunspot activity during the Spanish colonial period was lesser than or equal to 41}

Alternate Hypothesis, H_A : \mu > 41     {means that the mean sunspot activity during the Spanish colonial period was higher than 41}

The test statistics that would be used here <u>One-sample z test statistics</u> as we know about the population standard deviation;

                            T.S. =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean = 47

            σ = population standard deviation = 35

            n = sample of periods from Spanish colonial times = 40

So, <em><u>the test statistics</u></em>  =  \frac{47-41}{\frac{35}{\sqrt{40} } }

                                      =  1.08

(b) The value of z test statistics is 1.08.

(c) <u>Now, the P-value of the test statistics is given by;</u>

                P-value = P(Z > 1.08) = 1 - P(Z < 1.08)

                              = 1 - 0.8599 = <u>0.1401</u>

Since, the P-value of the test statistics is higher than the level of significance as 0.1401 > 0.05, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <u>we fail to reject our null hypothesis</u>.

Therefore, we conclude that the mean sunspot activity during the Spanish colonial period was lesser than or equal to 41.

8 0
3 years ago
Can anyone help me asap plzz.Solve the inequality. (a + 5.7 &gt; –2.3) (A)a &gt; 3.4 (B)a &gt; 8 (C)a &gt; –3.4 (D)a &gt; –8
Eduardwww [97]

Answer:

Solve the inequality. a + 5.7 > –2.3

(A)a > 3.4

(B)a > 8

(C)a > –3.4

<u>(D)a > –8</u>

Step-by-step explanation:

a+5.7>-2.3\\-5.7    \\a>-8

8 0
3 years ago
What is 2+4+12-12+21+14-10
Vanyuwa [196]

Answer:

31

Step-by-step explanation:

2 + 4 = 6

6 + 12 = 18

18 - 12 = 6

6 + 21 = 27

27 + 14 = 41

41 - 10 = 31

4 0
3 years ago
The lengths of the sides of the triangles are 13cm, 14cm, and 15cm. Is the triangle a right triangle?
natita [175]

Answer:

no i don't think

Step-by-step explanation:

it is not be a right angle is 90 and when u add it it doesn't match

4 0
3 years ago
There are 90 people in a group.
rewona [7]

Answer:

45 children 15 men 30 women

Step-by-step explanation:

8 0
3 years ago
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