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3 years ago

Need help! Figure shown.

Mathematics

2 answers:

Finger [1]3 years ago

7 0

Answer:C

Step-by-step explanation: In order for it to become the second figure it needs to be enlarged and reflected. It needs to be enlarged first so it will end up placed in the right spot.

Xelga [282]3 years ago

7 0

The answe is c because the guy on top of said it is

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The answer is 13!!!! b

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1/6 divided by 4 i need the answer please thank you.

TiliK225 [7]

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Barry's savings account has a balance of $2874. After 9 years, what will the amount of interest be at 5% compounded annually?

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A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized below

jok3333 [9.3K]

Answer:

The value of the test statistic = 2.58

Test statistic Z = - 4.805

|Z| = 4.805 > 2.58

Null hypothesis is rejected The value of the test statistic = 2.58

There is significant difference between in the mean number of times men and women send a Twitter message in a day

Step-by-step explanation:

Step(i):-

Sample size of men n₁ = 25

mean of the first sample x₁⁻ = 20

Standard deviation of the first sample σ₁ = 5

Sample size of women n₂ = 30

mean of the second sample x₂⁻ = 30

Standard deviation of the first sample σ₂ = 10

Level of significance ∝= 0.01

Step(ii):-

Null Hypothesis : H₀: There is no significant difference between in the mean number of times men and women send a Twitter message in a day

Alternative Hypothesis :H₁:There is significant difference between in the mean number of times men and women send a Twitter message in a day

Test statistic

$Z = \frac{x^{-} _{1} - x^{-} _{2} }{\sqrt{\frac{S.D_{1} ^{2} }{n_{1} }+\frac{ S.D_{2} ^{2}}{n_{2} } } }$

$Z = \frac{20 - 30 }{\sqrt{\frac{(5)^{2} }{25 }+\frac{ (10)^{2} }{ 30} } }$

Z = $\frac{-10}{2.081} = - 4.805$

The value of the test statistic = 2.58 C

|Z| = 4.805 > 2.58

Null hypothesis is rejected The value of the test statistic = 2.58

Conclusion:-

There is significant difference between in the mean number of times men and women send a Twitter message in a day

7 0

3 years ago

How do I solve this part a,b

Svetach [21]

Answer:

the anwser you put is correct

Step-by-step explanation:

congragulations! glad i could help :)

4 0

3 years ago