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2 years ago

Heeeeeeeeeeeeeeeeelp

Mathematics

1 answer:

mel-nik [20]2 years ago

8 0

Answer:6hrs and &270

8hours and &360

9.5hours and&427.50

Step-by-step explanation:

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How will the solution of the system y > 2x + and y < 2x + change if the inequality sign on both inequalities is reversed t

Gala2k [10]

Answer:

The System of inequality is ,

1. y > 2 x + p

2. y < 2 x + p

Suppose we assign some values to p and q and draw its graph

And, then the inequality sign on both inequalities is reversed

3. y < 2 x + p

4. y > 2 x + p

And , then draw it's graph

it has been found that, the solution set of both the inequality remains same.That is there is no point or set of points , which satisfy both the system of inequality.

The system has no solution.

5 0

3 years ago

Read 2 more answers

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

The five-number summary for the number of teams in each of Brad's fantasy football leagues is shown in the following table.

Westkost [7]

Answer:

The correct option is (C) 10.

Step-by-step explanation:

The five-number summary for the number of teams in each of Brad's fantasy football leagues is as follows:

Minimum: 4

Q₁: 7

Median: 10

Q₃: 14

Maximum: 18

The minimum value is the smallest value in the data set.

The first quartile (Q₁) is the value that is less than 75% of the observations.

The median is the middle most value of the data set. It is the value that is less than 50% of the observations.

The third quartile (Q₃) is the value that is less than 25% of the observations.

And the maximum value is the largest value in the data set.

So, the five-number summary suggests that about 50% of Brad's fantasy football leagues have fewer than 10 teams.

Thus, the correct option is (C).

4 0

4 years ago

Solve the inequality - 12 > -16. Then graph the solution.

ozzi

Solve the inequality c - 12 > -16.

$\begin{gathered} c-12>-16 \\ c-12+12>-16+12 \\ c>-4 \end{gathered}$

Plot the solution on the number line.

7 0

1 year ago

Fill in the blanks to express the quantities given in ratio language. Ratios must be expressed in simplest form. Deondra 36 Bo 4

Nadusha1986 [10]

Answer:

For every 7 miles Bo drove, Myesha drove 5 miles.

Step-by-step explanation:

Deondra: 36

Bo: 42

Myesha: 30

Divide them all by 6 and you'll get:

Deondra: 6

Bo: 7

Myesha: 5

3 0

3 years ago