when using the method of elimination to solve the system of equations below, what is the result of adding the two equations together?

Answer: I don't know, sorry!

Step-by-step explanation:

Answer:

Step-by-step explanation: soz cn't help

Answer: Average speed is given by the formula:

speed = distance ÷ time

Given that Darlene rode her bike 8 2/5 miles in 3/4 of an hour. We need to convert the mixed number 8 2/5 to an improper fraction.

8 2/5 = (8 x 5 + 2) / 5 = 42/5

So, Darlene rode her bike a distance of 42/5 miles in a time of 3/4 hours.

Substitute speed = distance ÷ time

speed = (42/5) ÷ (3/4)

To divide by a fraction, we invert and multiply:

speed = (42/5) x (4/3)

speed = 56/5

So, Darlene's average speed was 56/5 miles per hour (mph).

To simplify this fraction, we can divide both the numerator and denominator by 1:

speed = 11/1

The base and height of the rectangle are 80 and 60 feet.

A rectangle has a diagonal of 100 feet. The length that could be the base and height of the rectangle is as follows:

Therefore, let's use Pythagoras's theorem to find the base and the height of the triangle.

c² = a² + b²

where

Therefore,

80² + 60² = 100²

6400 + 3600 = 10000

10000 = 10000

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The high temperature on Tuesday was -5°F.

Given that,

On Monday, the high temperature in Sheboygan, Wisconsin, was –12°F.

The high temperature on Tuesday was 7 degrees warmer than the high temperature on Monday.

Let T be the high temperature on Tuesday and M be the high temperature on Monday.

By the given statement,

T = M + (7°F)

We have, M = -12°F

Substituting,

T = -12°F + 7°F

  = -5°F

Hence the required temperature is -5°F.

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The equation of the line in point slope form and slope intercept form are y + 4 = -10 (x + 5) and y = -10x - 19 respectively.

Given that,

A line passes through the point (-5, -4) and the slope is -10.

The equation of the line in point slope form can be written as,

y - y' = m(x - x')

where m is the slope and (x', y') is the point on the line.

Substituting,

y - -4 = -10(x - -5)

y + 4 = -10 (x + 5), which is the point slope form.

Simplifying,

y + 4 = -10x - 15

y = -10x - 19, which is the slope intercept form

Hence the point slope form is y + 4 = -10 (x + 5) and the slope intercept form is y = -10x - 19.

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Let's go through the process step-by-step to find the Standard Error of the Mean (SEM) for a 93% confidence interval for the proportion of newspapers with a non-conforming attribute.

Step 1: Define the variable of interest
The variable of interest here is whether the newspaper has a non-conforming attribute, which includes excessive ruboff, improper page setup, missing pages, or duplicate pages.

Step 2: Collect the data
You have already collected the data by selecting a random sample of n = 200 newspapers from all the newspapers printed during a single day.

Step 3: Organize the data
You have organized the results, which show that 35 newspapers contain some type of non-conformance, in a worksheet.

Step 4: Calculate the proportion
Now, we need to calculate the proportion of non-conforming newspapers:
Proportion (p) = (Number of non-conforming newspapers) / (Total number of newspapers in the sample)
p = 35 / 200 = 0.175

Step 5: Calculate the Standard Error of the Mean (SEM)
The formula for the SEM is:
SEM = sqrt[p * (1 - p) / n]
where p is the proportion of non-conforming newspapers and n is the sample size.
SEM = sqrt[0.175 * (1 - 0.175) / 200]
SEM ≈ 0.0283

So, the Standard Error of the Mean (SEM) for a 93% confidence interval for the proportion of newspapers with a non-conforming attribute is approximately 0.0283.

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The equivalent fractions for 1/5 and 3/4 with a common denominator of 20 are:

1/5 = 4/20

3/4 = 15/20

To write equivalent fractions for 1/5 and 3/4 using 20 as the common denominator

we need to multiply the numerator and denominator of each fraction by the same number such that the denominator becomes 20.

For 1/5:

1/5 = (1 x 4)/(5 x 4) = 4/20

Therefore, an equivalent fraction for 1/5 with a denominator of 20 is 4/20.

For 3/4:

3/4 = (3 x 5)/(4 x 5) = 15/20

An equivalent fraction for 3/4 with a denominator of 20 is 15/20.

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1. The people in the survey are 32

2. The problem is that there should not be a row for 57

3. There is nothing wrong with the vfrequency table

4. The teacher displays class testscores ion stem and leaf plot woyl give the most  valid conclusion

Count the frequency

8 + 10 + 12 + 2

= 32

A statistical instrument, termed as a frequency table, tabulates and illustrates how often particular elements or values belonging to numerous classifications crop up in a dataset.

In other words, it streamlines the procedure of managing and examining data, ultimately simplifying the identification of patterns and trends that may be present within the information at hand.

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To determine the critical value z alpha for alpha equals 0.04, we need to find the z value at which the standard normal distribution has a right-tailed area of 0.04.

First, we need to find the area in the left tail of the standard normal distribution that corresponds to 1 - alpha. Since alpha is 0.04, 1 - alpha is 0.96. Using a standard normal distribution table or calculator, we can find that the z value corresponding to a left-tailed area of 0.96 is approximately 1.75.

Next, we need to find the z value that corresponds to a right-tailed area of 0.04. This is simply the negative of the z value we found above since the standard normal distribution is symmetric at about 0. Therefore, the critical value z alpha for alpha equals 0.04 is approximately -1.75.

Note that the critical value is also sometimes referred to as the z-score, and is used in hypothesis testing to determine whether a sample mean is significantly different from a population mean. The critical value represents the boundary beyond which we reject the null hypothesis.
To determine the critical value zα for α=0.04, follow these steps:

Step 1: Identify the given values
- Right-tailed area (α) = 0.04

Step 2: Convert the right-tailed area to the left-tailed area
Since the standard normal distribution is symmetrical, you can find the left-tailed area by subtracting α from 1:
Left-tailed area = 1 - α = 1 - 0.04 = 0.96

Step 3: Find the z value corresponding to the left-tailed area
Using a z-table or an online calculator, look up the z-value corresponding to a left-tailed area of 0.96. This z value will be your critical value (zα).

The critical value zα corresponding to a right-tailed area of 0.04 (left-tailed area of 0.96) is approximately 1.75.

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To solve this problem, we can use the Pythagorean theorem, which states that in a right triangle, the sum of the squares of the two shorter sides (called the "legs") is equal to the square of the longest side (called the "hypotenuse").

In other words, if we let $a$ and $b$ be the lengths of the two legs, and $c$ be the length of the hypotenuse, we have:

$a^2 + b^2 = c^2$

In this case, we know that the hypotenuse has length 39 units, so we can write:

$a^2 + b^2 = 39^2 = 1521$

We also know that $a$ and $b$ are both integers, since they are the lengths of sides of a triangle. We can use this information to try out different values of $a$ and see if any of them result in a value of $b$ that is also an integer.

One way to do this is to start with $a=1$ and see what value of $b$ makes the equation $a^2 + b^2 = 1521$ true. We can rewrite this equation as:

$b^2 = 1521 - a^2$

If we plug in $a=1$, we get:

$b^2 = 1521 - 1^2 = 1520$

Now we need to find a perfect square that is less than or equal to 1520, since that will give us a value of $b$ that is an integer. The largest perfect square that is less than or equal to 1520 is $36^2 = 1296$, so we can try plugging in $b=36$:

$36^2 = 1296$

$1^2 + 36^2 = 1297$

This is close, but not quite right – we need the sum of the squares to be 1521, not 1297. We can try again with a larger value of $a$, and keep going until we find a value that works. This process can be a bit tedious, but fortunately there is a shortcut – we can use the fact that $a$ and $b$ must be the lengths of sides of a triangle to narrow down our choices.

Specifically, we know that in a triangle, the length of any side must be less than the sum of the lengths of the other two sides. In this case, we have a right triangle with hypotenuse length 39, so the length of each leg must be less than 39. This means that $a$ and $b$ must both be less than 39.

We can use this fact to quickly eliminate many of the possibilities. For example, if $a=1$, we know that $b^2 = 1520$, which means that $b$ must be greater than 39 (since $6^2 = 36$ and $7^2 = 49$). This tells us that $a$ must be at least 7 in order for there to be any hope of finding a value of $b$ that works.

Using this approach, we can quickly narrow down the possibilities and find that the only value of $a$ that works is 15. If we plug in $a=15$, we get:

$b^2 = 1521 - 15^2 = 216$

$b = \sqrt{216} = 6\sqrt{6}$

So the length of the shorter leg is $\boxed{15}$ units.

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Answer:

1) b. 3

2) a. 5

3) c. 4

4) d. 6

Step-by-step explanation:

The slope of the function have been solved below

The the slope/rate of change of Function A is 0.

Function B:

x | y

0 | 0

1 | 1

2 | 4

3 | 3

4 | 9

Function B between f(0) and f(1)?

(y1 - y0) / (x1 - x0)

= (1 - 0) / (1 - 0)

= 1/1 = 1

Function B between f(1) and f(2)?

(y2 - y1) / (x2 - x1)

= (4 - 1) / (2 - 1)

= 3/1 = 3

(y3 - y2) / (x3 - x2)

= (3 - 4) / (3 - 2)

= -1/1 = -1

The slope of Function A is 0.

Function B does not have constant slope

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There are 50,257 permutations of the 10 digits that either begin with the three digits 987, contain the digits 45 in the fifth and sixth positions, or end with the three digits 123.

To find the number of permutations that meet the given criteria, we can break the problem into three cases:

Case 1: Permutations that begin with the three digits 987.
For these permutations, we have 7 digits remaining that can be arranged in any order. Therefore, there are 7! = 5040 permutations that begin with 987.

Case 2: Permutations that contain the digits 45 in the fifth and sixth positions.
For these permutations, we can first place the digits 45 in the fifth and sixth positions, leaving us with 8 digits remaining. These 8 digits can be arranged in any order, so there are 8! = 40,320 permutations that contain the digits 45 in the fifth and sixth positions.

Case 3: Permutations that end with the three digits 123.
For these permutations, we have 7 digits remaining that can be arranged in any order before the final three digits. Therefore, there are 7! = 5040 permutations that end with 123.

To find the total number of permutations that meet at least one of these criteria, we can use the principle of inclusion-exclusion.

First, we add the number of permutations from each case:

5040 + 40,320 + 5040 = 50,400

Next, we subtract the number of permutations that meet two of the criteria. There are two pairs of criteria that overlap:

- Permutations that begin with 987 and contain 45 in the fifth and sixth positions
- Permutations that contain 45 in the fifth and sixth positions and end with 123

To count the number of permutations that meet both of these criteria, we can first place the digits 987 at the beginning, followed by the digits 45 in the fifth and sixth positions, and then the remaining 5 digits can be arranged in any order before the final 123. Therefore, there are 5! = 120 permutations that meet both criteria.

We can do the same for the other pair of overlapping criteria:

- Permutations that begin with 987 and end with 123
- Permutations that contain 45 in the fifth and sixth positions and end with 123

To count the number of permutations that meet both of these criteria, we can first place the digits 987 at the beginning, followed by the remaining 4 digits which can be arranged in any order before the final 123. Therefore, there are 4! = 24 permutations that meet both criteria.

Now we can subtract the total number of permutations that meet two criteria:

120 + 24 = 144

Finally, we add back in the number of permutations that meet all three criteria:

There is only one permutation that meets all three criteria: 98745*****123

Therefore, the total number of permutations that meet at least one of the given criteria is:

50,400 - 144 + 1 = 50,257

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The value of the constant c that makes the probability statement P(-esz Sc) = 0.252 correct is 0.68. To determine the value of the constant c that makes the probability statement P(-esz Sc) = 0.252 correct, we need to use the complement rule, which states that P(A) = 1 - P(A').

In this case, we can rewrite the statement as P(-esz Sc)' = 0.748 (since the complement of the event "-esz Sc" is "esz Sc'").

Next, we need to use the standard normal distribution table or calculator to find the z-score that corresponds to a probability of 0.748. The closest value we can find is 0.7464, which corresponds to a z-score of -0.68 (rounded to two decimal places).

Now we can use the standard normal distribution formula

[tex]z = (x - mu) / sigma,[/tex]

where mu is the mean (which is 0 for the standard normal distribution) and sigma is the standard deviation (which is 1 for the standard normal distribution).

Plugging in the values we have, we get -0.68 = (-c - 0) / 1, which simplifies to -0.68 = -c. Solving for c, we get c = 0.68 (rounded to two decimal places).

Therefore, the value of the constant c that makes the probability statement P(-esz Sc) = 0.252 correct is 0.68.

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To determine the minimum number of people at a party so that at least one of the three scenarios occurs, we can use the pigeonhole principle.

If we consider each person as a pigeon and each scenario as a hole, we need to determine the minimum number of pigeons (people) such that at least one hole (scenario) has three pigeons (people) in it.

For the first scenario, we need to find three people who are f2f friends. This means that each person needs to have two f2f friends (excluding themselves). So, if we have two people at the party, they cannot be f2f friends, and if we have three people, they can all be f2f friends. Therefore, the minimum number of people needed for this scenario is three.

For the second scenario, we need to find three people who have met online but not f2f. This means that each person needs to have two online friends (excluding themselves). If we have two people at the party, they cannot have any online friends, and if we have three people, it is possible that one person has two online friends while the other two have none. Therefore, the minimum number of people needed for this scenario is three.

For the third scenario, we need to find three people who are mutual strangers, having never met before. This means that each person needs to be a stranger to the other two people. If we have two people at the party, they cannot be strangers, and if we have three people, it is possible that all three are strangers to each other. Therefore, the minimum number of people needed for this scenario is three.

Therefore, the minimum number of people needed at the party so that at least one of the three scenarios occurs is three.
Using the pigeonhole principle, let's consider three categories for party attendees: face-to-face friends, online friends, and mutual strangers.

To ensure at least one of the given scenarios occurs, we need to apply the pigeonhole principle to each category, considering a group of three people. This means we will have three pigeonholes and need to find the minimum number of attendees to guarantee that one of the pigeonholes will have at least three people.

If there are two people in each category, there's no guarantee that any of the given scenarios will occur. Therefore, we need at least three people in one category. When we distribute three attendees across each category (2 f2f friends, 2 online friends, and 2 strangers), the next person attending the party will force at least one category to have three people.

Thus, the minimum number of people at the party to ensure one of the given scenarios occurs is 2+2+2+1 = 7 people.

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The correct answer is B) II only.

The condition that checks that the sampling distribution of the sample proportion is approximately normal is II only, which is np0≥10 and n(1−p0)≥10 for sample size n.

Option I is not sufficient by itself to ensure normality of the sampling distribution. While random sampling is important for reducing bias in the sample, it does not guarantee that the sample proportion will have a normal distribution.

Option III is not relevant to the normality of the sampling distribution, as it pertains to the sample size relative to the population size and not the distribution of the sample proportion.

Therefore, the correct answer is B) II only.

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The best statistic to use to describe each variable will depend on the specific characteristics of the data distribution and the research question of interest. However, in general:

LOS (length of stay): The most appropriate statistic to use to describe LOS would be the median, as it is less affected by outliers and skewed distributions than the mean. The median represents the central value of the distribution, i.e., the value that separates the top 50% from the bottom 50% of observations. This is useful in understanding the typical or average length of stay, without being overly influenced by unusually long or short stays that may be present in the data.

Charge: The most appropriate statistic to use to describe charges would be the mean, as it is a measure of central tendency that reflects the total amount charged divided by the total number of cases. The mean is sensitive to outliers and extreme values, so if the distribution is heavily skewed or contains extreme values, the median may be a more appropriate measure.

Admission source: The most appropriate statistic to use to describe admission source would be the mode, as it is a categorical variable that represents the most common source of admission. The mode provides insight into the most frequent route of admission for patients, which can be useful in identifying patterns and trends in patient flow.

Gender: The most appropriate statistic to use to describe gender would be the frequency or count of males and females in the dataset, as it is a binary categorical variable. The frequency provides insight into the distribution of males and females in the sample, which can be useful in identifying gender-related disparities or trends in healthcare utilization.

Discharge status: The most appropriate statistic to use to describe discharge status would be the frequency or count of each category of discharge status, such as home, skilled nursing facility, hospice, etc. This provides insight into the distribution of patients' discharge destinations, which can be useful in understanding the healthcare needs and outcomes of different patient populations.

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The correct statement regarding the data-sets is given as follows:

A. A girl is 10% more likely to work after school than a boy.

A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.

Out of 30 boys, 18 work after school, hence the probability is given as follows:

18/30 = 0.6 = 60%.

Out of 20 girls, 14 work after school, hence the probability is given as follows:

14/20 = 0.7 = 70%.

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The correct answer is e) no, it is not a function because it does not pass the horizontal line test.

A function must have only one output for every input, and the horizontal line test checks for this by seeing if any horizontal line intersects the graph more than once. This graph has multiple points where a horizontal line would intersect it more than once, indicating that it does not represent a function. The fact that it contains a quadratic and linear relation or has two open circles is not relevant to determining whether it is a function or not.
C) Yes, it is a function because it passes the vertical line test.

A graph represents a function if and only if it passes the vertical line test. This means that for any given x-value, there is only one corresponding y-value. The horizontal line test is used to determine if a function has an inverse that is also a function, which is not relevant to this question. The presence of a quadratic and linear relation or open circles does not necessarily mean that the graph does not represent a function.

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When designing a logic circuit from a description of the problem, there are several necessary steps that must be taken.

When designing a logic circuit from a description of the problem, the necessary steps you should take are:
1. Understand the problem: Carefully read and analyze the problem description to determine the input and output requirements.
2. Identify inputs and outputs: List down all the required inputs and outputs based on the problem description.
3. Define truth table: Create a truth table that represents the relationship between the inputs and outputs of the circuit.
4. Simplify the Boolean expression: Use Boolean algebra or Karnaugh maps to simplify the Boolean expression derived from the truth table. This will minimize the number of gates required in the circuit.
5. Select appropriate logic gates: Based on the simplified Boolean expression, select the necessary logic gates (AND, OR, NOT, etc.) to build the circuit.
6. Design the circuit: Connect the selected logic gates to create the desired logic circuit, ensuring proper connections between inputs, gates, and outputs.
7. Verify the design: Test the designed circuit using various input combinations and ensure it produces the correct output as per the problem description.
By following these steps, you can successfully design a logic circuit that meets the requirements of the given problem.

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The scale factor used in the dilation of the triangles is 3

From the question, we have the following parameters that can be used in our computation:

The scale factor is calculated as

Scale factor  = A'/A

Substitute the known values in the above equation, so, we have the following representation

Scale factor  = (-3, -3)/(-1, -1)

Evaluate

Scale factor  = 3

Hence, the scale factor is 3

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The equation of the quadratic function in standard form is -6/25(x - 7)(x + 2) = 0 and the factored form is (x - 7)(x + 2) = 0.

To find the equation of the quadratic function, we need to use the x-intercepts to write the equation in factored form, which is (x - r)(x - s) = 0, where r and s are the roots of the equation. In this case, the roots are -2 and 7, so the factored form of the equation is (x + 2)(x - 7) = 0.

To find the value of a in the standard form equation, we need to use the point (5,-42). We substitute x = 5 and y = -42 into the standard form equation and solve for a. This gives us the equation -2a + 15b + c = -42.

We can also find the value of c by substituting one of the x-intercepts into the factored form equation. If we substitute x = -2, we get (-2 + 2)(-2 - 7) = 0, which simplifies to -18 = c.

Substituting this value of c into the equation -2a + 15b + c = -42 gives us -2a + 15b - 18 = -42, which simplifies to -2a + 15b = -24.

Finally, we can use the factored form equation to solve for b. Expanding the equation (x + 2)(x - 7) = 0 gives us x² - 5x - 14 = 0. Using the quadratic formula or factoring, we find that the roots are -2 and 7, which are the same as the x-intercepts.

We can therefore write the equation in standard form as a(x - 7)(x + 2) = 0. To find the value of a, we use the equation -2a + 15b - 18 = -42 and the value of b = -1 to get a = -6/25.

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The equations of the graph from the figure are y = 4 and y = -2

From the question, we have the following parameters that can be used in our computation:

The graph

On the graph, we can see that

We have two horizontal lines that pass through the points y = 4 and y = -2

This means that the equations represented on the graph are y = 4 and y = -2

So, we can conclude that none of the options are true from the options

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Answer:96

Step-by-step explanation:

(4x4)+(4x4)+(4x4)+(4x4)+(4x4)+(4x4)

16+16+16+16+16+16

48+48

96

The resulting cross section of the prism will be a parallelogram.

When a right rectangular prism is sliced in a way such that the plane passes through the prism at a slant, the resulting cross section is a parallelogram. This is because the intersection of a plane and a rectangular prism that is not parallel to any of its faces is always a parallelogram.

The shape and size of the parallelogram will depend on the orientation of the plane and the dimensions of the prism. Since the prism is a right rectangular prism, the opposite faces are parallel and congruent, and so are the opposite edges of the parallelogram cross section.

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A chi-square test involves a comparison between what is observed and what would be expected by chance

None of the options is correct.

A chi-square test based on a 2x2 table using a level of 0.05 would require comparing the computed chi-square statistic with the critical value of the chi-square distribution with 1 degree of freedom, which is 3.84 at a significance level of 0.05. If the computed chi-square statistic is greater than or equal to the critical value, then the test is statistically significant at the 0.05 level.

In this case, the chi-square statistic is given as 11.2, which is greater than 3.84, so the test is statistically significant at the 0.05 level.

Therefore, the correct answer is (b) Yes, because 11.2 > 3.84

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