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Crank
2 years ago
10

Help pls, it's due in 20 minutes

Mathematics
2 answers:
satela [25.4K]2 years ago
8 0

Answer:

Step-by-step explanation:

3 (5+1) divided by 3 to the second power = 2

8 divided by 4 times 2 = 4

7 + 2.4 = 9.4

i hope this helps god bless

Karo-lina-s [1.5K]2 years ago
6 0

Answer:

3 (5+1) /3 2 = 2

8 / 4 x 2 = 4

7 + 2 x 4 = 15

2, 4, 15

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A video sharing website starts with 20,000 members. Each year it loses 25% of the members, but adds 10,000 new members after the
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20,000 x 25 = 500,000
500,000 divided by 100 = 5,000 members are lost.
Members left = 15,000
Members added = 10,000
Members every year  = Members left + Members added
                                   =          15,000 +  10,000
                                   =          25,000

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3 years ago
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Answer to 1: 648
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The gini ratio of income inequality ranges between: question 18 options:
hram777 [196]
The answer is d) 0 and 1.
8 0
3 years ago
Find the sum.<br> 7x + 15x=
BaLLatris [955]

Answer:

7x + 15x= 21x

Step-by-step explanation:

7x + 15x

= (7 + 15)x

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4 0
3 years ago
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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
3 years ago
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