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2 years ago

Six friends are going to a consert. Their tickets total

Mathematics

1 answer:

irga5000 [103]2 years ago

7 0

Answer:

196 and 280

Step-by-step explanation:

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What are some decimals for 9/2 other than 4.5

PolarNik [594]

Answer:

1.4953

Step-by-step explanation:

You will need to break down 4.5

4√5

1.4953

8 0

1 year ago

What's the ratio of 186:76

timurjin [86]

The ratio of 186:76 can be simplified to 93:38 if we divide both numbers by 2.

8 0

2 years ago

Read 2 more answers

Lines m and n are parallel and m<1=140*<br> What is m<7?

Arada [10]

$m\angle 7=180-m\angle 5\\
m\angle 5=m\angle 1=140\\
m\angle 7=180-140\\
m\angle 7=40$

6 0

2 years ago

In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the fol

Julli [10]

Answer:

$0.071,1.928$

Step-by-step explanation:

Downtown Store North Mall Store

Sample size n 25 20

Sample mean $\bar{x}$ $9 $8

Sample standard deviation s $2 $1

$n_1=25\\n_2=20$

$\bar{x_1}=9\\ \bar{x_2}=8$

$s_1=2\\s_2=1$

$x_1-x_2=9-8=1$

Standard error of difference of means = $\sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}$

Standard error of difference of means = $\sqrt{\frac{2^2}{25}+\frac{1^2}{20}}$

Standard error of difference of means = $0.458$

Degree of freedom = $\frac{\sqrt{(\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}})^2}{\frac{(\frac{s_1^2}{n_1})^2}{n_1-1}+\frac{(\frac{s_2^2}{n_2})^2}{n_2-1}}$

Degree of freedom = $\frac{\sqrt{(\frac{2^2}{25}+\frac{1^2}{20}})^2}{\frac{(\frac{2^2}{25})^2}{25-1}+\frac{(\frac{1^2}{20})^2}{20-1}}$

Degree of freedom =36

So, z value at 95% confidence interval and 36 degree of freedom = 2.0280

Confidence interval = $(x_1-x_2)-z \times SE(x_1-x_2),(x_1-x_2)+z \times SE(x_1-x_2)$

Confidence interval = $1-(2.0280)\times 0.458,1+(2.0280)\times 0.458$

Confidence interval = $0.071,1.928$

Hence Option A is true

Confidence interval is $0.071,1.928$

4 0

2 years ago

Uma empresa do ramo de confecções produz e comercializa calças jeans. Se x representa a quantidade produzida e comercializada (e

Semenov [28]

Answer:

I am in 5 classso i did not known answer

5 0

2 years ago