Which ordered our is a solution for this system of linear inequalities?

The ratios of their perimeters and the ratios of their areas are 1) 3:1 and 9:1 and 2) 7:4 and 49:16.

Given the scale factor of two similar polygons, we need to find the ratio of their perimeters and the ratios of their areas,

To find the ratio of the perimeters of two similar polygons, we can simply write the scale factor as it is because the ratio of the perimeter is equal to the ration of the corresponding lengths.

1) So, perimeter = 3:1

The ratio of areas between two similar polygons is equal to the square of the scale factor.

Since the scale factor is 3:1, the ratio of their areas is:

(Ratio of areas) = (Scale factor)² = 9/1 = 9:1

Similarly,

2) Perimeter = 7:4

Area = 49/16

Hence the ratios of their perimeters and the ratios of their areas are 1) 3:1 and 9:1 and 2) 7:4 and 49:16.

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We are 99% confident that the true average stance duration among elderly individuals lies within the range of 744.56 ms to 857.44 ms.

To test whether the true average stance duration is larger among elderly individuals than among younger individuals, we can perform a one-tailed independent samples t-test. The null hypothesis (H0)

Using the t-test, we compare the means and standard deviations of the two samples and calculate the test statistic

a) To calculate a 99% confidence interval for the true average stance duration among elderly individuals, we can use the sample mean, sample standard deviation, and the t-distribution.

Given:

Older adults: n = 28, sample mean = 801, sample standard deviation = 117

Using the formula for a confidence interval for the mean, we have:

Margin of error = t * (sample standard deviation / √n)

Since the sample size is relatively large (n > 30), we can use the z-score instead of the t-score for a 99% confidence interval. The critical z-value for a 99% confidence level is approximately 2.576.

Calculating the margin of error:

Margin of error = 2.576 * (117 / √28) ≈ 56.44

The confidence interval is then calculated as:

Confidence interval = (sample mean - margin of error, sample mean + margin of error)

Confidence interval = (801 - 56.44, 801 + 56.44) ≈ (744.56, 857.44)

b) To test whether the true average stance duration is larger among elderly individuals than among younger individuals, we can perform a one-tailed independent samples t-test.

The null hypothesis (H0): The true average stance duration among elderly individuals is equal to or less than the true average stance duration among younger individuals.

The alternative hypothesis (Ha): The true average stance duration among elderly individuals is larger than the true average stance duration among younger individuals.

. With the given data, perform the t-test and obtain the p-value.

c) To construct a 95% confidence interval for the difference in means between older and younger adults, we can use the formula for the confidence interval of the difference in means.

Given:

Older adults: n1 = 28, sample mean1 = 801, sample standard deviation1 = 117

Younger adults: n2 = 16, sample mean2 = 780, sample standard deviation2 = 72

Calculating the standard error of the difference in means:

Standard error = √((s1^2 / n1) + (s2^2 / n2))

Standard error = √((117^2 / 28) + (72^2 / 16)) ≈ 33.89

Using the t-distribution and a 95% confidence level, the critical t-value (with degrees of freedom = n1 + n2 - 2) is approximately 2.048.

Calculating the margin of error:

Margin of error = t * standard error

Margin of error = 2.048 * 33.89 ≈ 69.29

The confidence interval is then calculated as:

Confidence interval = (mean1 - mean2 - margin of error, mean1 - mean2 + margin of error)

Confidence interval = (801 - 780 - 69.29, 801 - 780 + 69.29) ≈ (-48.29, 38.29)

Comparison with part (b): In part (b), we performed a one-tailed test to determine if the true average stance duration among elderly individuals is larger than among younger individuals. In part (c), the 95% confidence interval for the difference in means (-48.29, 38.29) includes zero. This suggests that we do not have sufficient evidence to conclude that the true average stance duration is significantly larger among elderly individuals compared to younger individuals at the 95% confidence level.

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Based on the given information "all other things being equal," we can estimate that the traffic will be higher for a dealership in a suburban location compared to a rural location. Therefore, we would estimate a positive number, indicating that the traffic in the suburban location is expected to be higher than in the rural location.

In general, a dealership in a suburban location tends to experience higher traffic compared to a rural location. This estimation is based on several factors. Suburban areas are typically more densely populated and have a higher concentration of residential and commercial activities, leading to increased overall traffic volume.

Additionally, suburban locations often have better transportation infrastructure, including highways, main roads, and public transportation options, which attract more commuters and potential customers to the area.

On the other hand, rural areas are characterized by lower population densities and fewer amenities, resulting in lower levels of traffic. Therefore, the estimate of a positive difference in traffic between a suburban and rural dealership is reasonable.

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The letters in the word MIAMI are rearranged at random so that every possible anagram is equally likely. The probability that it still spells MIAMI is 1/5.

Let us count the total number of ways MIAMI can be arranged regardless of condition.

There are 2 M’s 2 I’s 1 A in word.

Total ways of arrangement will be = 5!/2!2!

​Total ways of arrangement will be = (5 × 4 × 3 × 2!)/2! × 2 × 1

Total ways of arrangement will be = 5 × 2 × 3

Total ways of arrangement will be = 30 ways

Now, ways in which all similar words are together, thus we have to consider 2M's as one unit, similarly 2 I's as a unit, so number of ways will be 3!.

Thus, the probability will be = 3!/30

The probability will be = (3 × 2 × 1)/30

The probability will be = 6/30

The probability will be = 1/5

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Answer:

We call base 2 the constant ratio. In fact, for any exponential function with the form f(x)=abx f ( x ) = a b x , b is the constant ratio of the function. This means that as the input increases by 1, the output value will be the product of the base and the previous output, regardless of the value of a.

Step-by-step explanation:

Notice from the table that:

the output values are positive for all values of x

as x increases, the output values increase without bound

as x decreases, the output values grow smaller, approaching zero

The graph below shows the exponential growth function

f(x)=2x

Answer:

(3, -4) or x = 3 and y = -4

Step-by-step explanation:

Hope this helps!

Population standard deviation, level of significance are same.

Margin of error increased.

With increase in margin of error sample size decreases.

By dividing the population's standard deviation by the sample size and then multiplying the resulting number by the crucial factor, the margin of error—a statistical expression used to estimate how much a result will deviate from the value of the full population—can be determined.

The standard deviation of the sample statistics, if we could take several samples of the same size, is the standard error.

Population standard deviation, level of significance are same.

Margin of error increased.

Margin of error increases leads to decrease in the sample size

as the margin of error is in denominator position in sample size formula. Hence with increase in margin of error sample size decreases.

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Answer:

B

Step-by-step explanation:

No matter what value you multiply a, the fraction will remain unchanged. That is because you can divide an a out from the numerator and the denominator. Thus, doubling a has no affect on the fraction, and in fact, u can simplify it to just bc. Now, if you halve b, it will simply just halve the actual value. When you halve b, you are simply executing (1/2)(b)(c). Therefore, you can rearrange the expression to be (1/2)(bc), which is just halving bc. If you decrease by 1/2, it's the same thing as being half of the value it was before. Therefore, the answer is b.

Answer:

(2,3)

Step-by-step explanation:

The equations for your midpoints

\(\frac{x1+x2}{2}\), \(\frac{y2+y1}{2}\)

So for the x coordinate midpoint:

=(-3+7)/2

=(4)/2

=2

And now the y coordinate midpoint:

=(10+-4)/2

=(6)/2

=3

midpoint=(2,3)

(2,3)

The equations for your midpoints

,

So for the x coordinate midpoint:

=(-3+7)/2

=(4)/2

=2

And now the y coordinate midpoint:

=(10+-4)/2

=(6)/2

=3

midpoint=(2,3)

The computed value of the test statistic is 2.94.

Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.

We have a sample size of n = 12, engine size (x) and emissions (y) are the two variables being correlated, and the sample correlation coefficient is r = 0.47.

The null hypothesis is that the population correlation is zero (H0: ρ = 0) and the alternative hypothesis is that the population correlation is positive (Ha: ρ > 0).

To compute the test statistic, we need to first calculate the degrees of freedom (df), which is (n-2) = 10 in this case.

We can then use the formula for the test statistic, which is:

t = (r√(df)) / √1 - r²

Substituting the values we have, we get:

t = (0.47 √10) / √(1 - 0.47²)

t = 2.94

Therefore, the computed value of the test statistic is 2.94.

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The area of the square is 25ft² and the perimeter is 20ft.

It's important to note that the area of a square is calculated as:

= Side ²

The perimeter is calculated as:

= 4 × Side

From the information given, the side is 5ft. The area will be:.

= 5 × 5

= 25ft²

The perimeter will be:

= 4 × Sode

= 4 × 5ft.

= 20 feet

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Answer:

true

Step-by-step explanation:

Answer:

It is nonlinear

Step-by-step explanation:

This is easy it is because linear is a straight line with no curves and this line has curves which makes it nonlinear.

Answer: Nonlinear

Step-by-step explanation: This is because the line is not straight and it contains curves.

A unity feedback control system is characterized by an open-loop transfer function G(s)H(s)=k/s(s+10). The system gain k so that the system will have a damping ratio of 0.5 is 4. The corresponding rise time is 2.3s, settling time is 4.4s, and peak overshoot is 0.26.

To determine the system gain k so that the system will have a damping ratio of 0.5, we can use the equation  ζ=1/2ωn. Rearranging the equation yields k=2ωn2. Using the damping ratio of 0.5, this yields k=4.
For this value of k, the rise time, settling time, and peak overshoot can be determined using the following equations:
Rise Time: Tr=4.6/ωn
Settling Time: Ts=4.4/ζωn
Peak Overshoot: Mp=e^(-ζπ/√1-ζ^2)
Given that the damping ratio is 0.5 and the system is subjected to a step input of 1V, we can determine the rise time, settling time, and peak overshoot.
Rise Time: Tr=4.6/ωn=4.6/2=2.3s
Settling Time: Ts=4.4/0.5ωn=4.4/1=4.4s
Peak Overshoot: Mp=e^(-0.5π/√1-0.5^2)=0.26

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Let's assume that Mr. and Mrs. Johnson bought x adult tickets and y children's tickets.

Since there are three children, we know that:

y = 3x

The total cost of the parents' tickets is 7x, and the total cost of the children's tickets is 4y. Substituting y = 3x, we get:

total cost of parents' tickets = 7x

total cost of children's tickets = 4(3x) = 12x

Therefore, the ratio of the total cost of the parents' tickets to the total cost of the children's tickets is:

(7x) / (12x) = 7/12

So the answer is 7/12, which cannot be simplified further. Therefore, the ratio is 7/12, which can be written in the form aib as 0+7/12i.

Answer: 7:6

Step-by-step explanation:

1. There are two adults (Mr. and Mrs. Jonhson) and three children. So let's make adults = y and children = x

2. Adult tickets cost $7. So we are going to multiply 7 x 2y = $14

3. Children's tickets cost $4. So we are going to multiply 4 x 3x = $12

4. The last step is to fully reduce \(\frac{14}{12}\) = \(\frac{7}{6}\)

5. So the answer is 7:6

Step-by-step explanation:

Order from least to greatest. -0.36, 0.65 , - 8/15, 1/5

-0.36 = -0.36

0.65 = 0.65

- 8/15 = - 0.533333

1/5 = 0.2

least to greatest:

- 8/15 , -0.36 , 1/5 , 0.65

Answer:

7

Step-by-step explanation:

because you take the 6 and the 9 and you see how far apart from each pother that would be 3 so the you add that to the 4 and you get 7.   :)

Answer:

5000-4000=1000

Step-by-step explanation:

you subtract to get your answer

The Sampling Distribution of Proportion measures the proportion of success, i.e. a chance of occurrence of certain events, by dividing the number of successes i.e. chances by the sample size 'n'.

What is the purpose of the sampling proportion?

Sampling is frequently used to calculate the percentage of a population that possesses a certain attribute, such as the percentage of all faulty goods that come off an assembly line or the percentage of all customers that enter a store and make a purchase before leaving.

The population proportion is the mean of all sample proportions (p-hat) when repeated random samples of a certain size n are collected from a population of values for a categorical variable, where the proportion in the category of interest is p. (p). The sample size times the likelihood of success for each trial yields np, which is the mean of the sampling distribution of a sample proportion (or observation). The chance of success for each trial is p, and it is the mean of the sampling distribution of a sample fraction (or observation).

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A tables in math is the multiplication table that includes the list of multiples of natural numbers.

Students learn the multiples of a number in math table, which is the foundation of the subject. Multiplication tables have been taught to us since we were in primary school. We may swiftly solve issues involving multiplication with the aid of these math tables. Thus, it is essential for pupils to memorize the math tables 1 through 20, enabling them to complete challenging calculations with ease.

Understanding mathematics requires the use of math tables. It is essential that the pupils have a firm grasp of math tables because failing to do so would make it difficult for them to comprehend other areas of mathematics. Students are likely to struggle with fundamental math concepts like decimals, percentages, fractions, ratios, etc. without even a basic understanding of math tables. Once you have learned these multiplication tables, you will remember them for the rest of your life.

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The domain and range of the function y = 3x + 2 is all real numbers

3. Domain: Real Numbers, Range: Real Numbers, Function: y = x

4. Domain: Real Numbers, Range: Real Numbers, Function: y = x^2

5. Domain: Real Numbers, Range: Real Numbers, Function: y = x^3

6. Domain: Real Numbers, Range: Real Numbers, Function: y = x^4

7. Domain: Real Numbers, Range: Real Numbers, Function: y = x^5

8. Domain: Real Numbers, Range: Real Numbers, Function: y = x^6

The domain and range of the function y = 3x + 2 is all real numbers

the complete question is :

relations domain range and functions 3-8

What is the domain and range of the function y = 3x + 2?

Domain: Real Numbers, Range: Real Numbers

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To find the sum of the vertex angles in various polygons, we need to sketch the polygons and then calculate the sum. For a hexagon, octagon, and dodecagon, the sums of the vertex angles are 720°, 1,080°, and 1,800°, respectively.

a. Hexagon: A hexagon is a polygon with six sides. To find the sum of the vertex angles, we can divide the hexagon into triangles. Since each triangle has an interior angle sum of 180°, the hexagon can be divided into four triangles. Therefore, the sum of the vertex angles in a hexagon is 4 * 180° = 720°.

b. Octagon: An octagon is a polygon with eight sides. Similar to the hexagon, we can divide the octagon into triangles. Dividing it into six triangles, each with an interior angle sum of 180°, the sum of the vertex angles in an octagon is 6 * 180° = 1,080°.

c. Dodecagon: A dodecagon is a polygon with twelve sides. Dividing it into ten triangles, each with an interior angle sum of 180°, the sum of the vertex angles in a dodecagon is 10 * 180° = 1,800°.

Therefore, the sum of the vertex angles in a hexagon is 720°, in an octagon is 1,080°, and in a dodecagon is 1,800°.

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Find the sum of the vertex angles of the following polygons---

a. A hexagon

b. An octagon

c. A dodecagon.

The average speed s of oxygen molecules in the air is directly proportional to the square root of the absolute temperature T. If the speed of the molecules is 460 ( m)/(s) at 273 K,  the speed at 300 K is 481.496

Based on the provided information;

S ∝ √ T

S= K√ T

460 =K √ 273

460= K* 16.5227

K= 460/16.5227

K=27.8

S= K√ T

S=27.8*√ 300

S=27.8*17.32

=481.496

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Answer:

m=1/7x

Step-by-step explanation:

Answer:

\( slope= \frac{1}{7} \)

Step-by-step explanation:

\((3 \: \: \: \: \: \: \: 2) = > (x1 \: \: \: \: \: \: \: x2)\\ (10 \: \: \: \: 3) = > (y1 \: \: \: \: \: \: \: y2)\)

\(slope \\ = \frac{y1 - y2}{x1 - x2} \\ = \frac{2 - 3}{3 - 10} \\ = \frac{ - 1}{ - 7} \\ = \frac{1}{7} \)

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The probability that greater than 99 out of 160 students will graduate on time is 0.1011, or 10.11%

To approximate the probability that greater than 99 out of 160 students will graduate on time given that the probability for a single student is 57%, we will use the normal distribution follow the given steps:

1. Determine the mean (μ) and standard deviation (σ) of the binomial distribution.
  μ = n * p = 160 * 0.57 = 91.2
  σ = sqrt(n * p * (1-p)) = sqrt(160 * 0.57 * 0.43) ≈ 6.498

2. Convert the problem to a standard normal distribution (Z-distribution) by finding the Z-score:
  Z = (X - μ) / σ
  Since we want to find the probability of more than 99 students graduating, we will use 99.5 (continuity correction).
  Z = (99.5 - 91.2) / 6.498 ≈ 1.276

3. Look up the Z-score in a standard normal (Z) table or use a calculator to find the area to the right of Z. The area to the left of Z is 0.8989.

4. Subtract the area to the left of Z from 1 to find the area to the right (our desired probability):
  P(X > 99) = 1 - 0.8989 = 0.1011

So, the probability that greater than 99 out of 160 students will graduate on time is approximately 0.1011, or 10.11% when rounded to four decimal places.

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Answer:

Circle the -3 or the -2 in the final product

Step-by-step explanation:

If you multiply it out, the last terms are -2 and -3 which equal 6, not negative 6 so, that would be wrong factoring.

Answer:

5

Step-by-step explanation:

-2^2=-4

3^2=9

add

-4+9=5