simplify 4x³ * 9x⁵
[tex]4x {}^{3} \times 9x {}^{5} [/tex]
​

Answer:

56°

Step-by-step explanation:

angles on a straight line add up to 180°

so we are already given that the other angle which lies on the same straight line with angle X is 124 ° .which means that we should subtract 124° from 180°

A graph that has an edge between each pair of its vertices is a complete graph. The number of Hamilton circuits in such a graph with "n" vertices is given by the factorial expression.


A graph that has an edge between each pair of its vertices is called a complete graph. In a complete graph, every vertex is directly connected to every other vertex by an edge.

To calculate the number of Hamilton circuits in a complete graph with "n" vertices, we can use the factorial expression (n-1)!. This is because in a Hamilton circuit, each vertex is visited exactly once, except for the starting and ending vertex.

Starting from any vertex, there are (n-1) choices for the next vertex, (n-2) choices for the third vertex, and so on, until only one choice is left for the last vertex. Therefore, the number of Hamilton circuits is given by (n-1)!.

For example, in a complete graph with 4 vertices (n = 4), the number of Hamilton circuits would be (4-1)! = 3! = 6.

In summary, a graph that has an edge between each pair of its vertices is a complete graph, and the number of Hamilton circuits in such a graph with "n" vertices is given by the factorial expression (n-1)!.

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Answer:

-18

Step-by-step explanation:

Answer:

P(less than 2) = P(1) = 1/6

A is correct.

The t-value needed to develop the 95% confidence interval for the population mean SAT score is: t = 2.009

What is statistics?

Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of numerical data. It involves the use of methods and techniques to gather, summarize, and draw conclusions from data.

To find the t-value needed to develop the 95% confidence interval for the population mean SAT score, we can use the following formula:

t = (x - μ) / (s / √(n))

where:

x = sample mean (1300)

μ = population mean (unknown)

s = sample standard deviation (200)

n = sample size (49)

To find the t-value, we need to find the margin of error (ME) first:

ME = t* (s / √(n))

We know that for a 95% confidence interval, the critical value of t is 2.009 (from t-distribution table or calculator) with 48 degrees of freedom

(df = n-1).

Therefore, the t-value needed to develop the 95% confidence interval for the population mean SAT score is:

t = 2.009.

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The input value (x) at which the two functions have equal values is x = 5.

From the given information, we have f(x) = 3 and g(x) = x - 2.

We want to find the input value (x) for which f(x) = g(x) is true.

Setting the two functions equal, we have:

3 = x - 2

To find the value of x, we can solve this equation:

x - 2 = 3

Adding 2 to both sides:

x = 5

Therefore, the input value (x) at which the two functions have equal values is x = 5.

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the volume of the sphere is 4186. 6 ft³

The formula for calculating the volume of a sphere shape is expressed with the equation;

V = 4/3 πr³

Such that the parameters of the formula are expressed thus;

Now, substitute the values as shown in the diagram, we have that;

Volume = 4/3 × 3.14 × 10³

Find the cube value

Volume = 4/3 × 3.14 × 1000

Multiply the value

Volume = 12560/3

Divide the values

Volume = 4186. 6 ft³

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Thus, the velocity of money in would be 3.5 .

The velocity of money is a measure of the rate at which money changes hands in an economy. It is calculated by dividing the nominal GDP by the money supply.

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The area of the triangular parcel of land is approximately 305,682.4 square feet.

We can use Heron's formula to find the area of a triangular parcel of land. This formula states that the area of a triangle with sides a, b, and c is given by:
Area = √(s(s-a)(s-b)(s-c))
where s is the semi-perimeter of the triangle, given by:
s = (a + b + c)/2
Using the lengths of the sides given in the problem, we can calculate the semi-perimeter:
s = (860 + 820 + 1038)/2 = 1759
Then we can plug this value into Heron's formula to find the area:
Area = √(1759(1759-860)(1759-820)(1759-1038))
Area = √(1759×899×939×721)
Area = √(93587715844)
Area = 305682.4 square feet (rounded to the nearest tenth)
Therefore, the area of the triangular parcel of land is approximately 305,682.4 square feet.

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The angle that the ramp makes with the ground is approximately 19 degrees.

the   angle    that the ramp makes with the ground can be found using trigonometry. the tangent of the angle is equal to the height of the ramp divided by the horizontal distance it covers:

tan(θ) = height / distance

where θ is the angle, height is 3.5 ft, and distance is 10 ft.

tan(θ) = 3.5 / 10θ = arctan(3.5 / 10)

θ = 19.1 degrees (rounded to the nearest degree)

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You can check that the sum of these integers is indeed five times the second integer, which is -3.

Let x be the second integer in the sequence. Then the six consecutive integers are x-2, x-1, x, x+1, x+2, and x+3. The sum of these integers is:
(x-2) + (x-1) + x + (x+1) + (x+2) + (x+3) = 6x + 3
We know that this sum is equal to five times the second integer, which is x. Therefore, we can write the equation:
6x + 3 = 5x
Simplifying this equation, we get:
x = -3
So the second integer in the sequence is -3, and the six consecutive integers are:
-5, -4, -3, -2, -1, 0
You can check that the sum of these integers is indeed five times the second integer, which is -3.

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Answer:

G(9, -5)

Step-by-step explanation:

Point G is not shown in the figure, but I assume point G is on the bottom side of the square, directly below point F.

We are told each side of the square is 8 units long.

Starting at point E, to get to point G, go 8 units right and 8 units down.

Start at E(1, 3).

Then go 8 units right to point F(9, 3).

Now go 8 units down to point G(9, -5).

When testing the goodness of fit for the logistic regression model, if the obtained chi-square is less than the critical value, one would " Accept the null hypothesis". The correct option is c.

In the goodness of fit test for the logistic regression model, the null hypothesis states that there is no significant difference between the observed and expected values. If the obtained chi-square value is less than the critical value, it means that the difference between the observed and expected values is not significant, and hence, we fail to reject the null hypothesis. Therefore, we accept the null hypothesis and conclude that the model fits the data well. On the other hand, if the obtained chi-square value is greater than the critical value, we reject the null hypothesis and conclude that the model does not fit the data well.

The correct option is c.

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Shelly ordered the 16 candy bags.

The operation or process of finding the difference between two numbers or quantities, denoted by a minus sign (−).

We have the information from the question:

Shelly paid a total of $15 for bags of candy she ordered on-line.

The cost of each bag was $0.75

Shipping charge was a flat rate $3.00

We have to find the how many bags of candy did shelly order.

Now, According to the question:

We have to subtract shipping charge from total paid charges, we get:

Total paid - shipping charge

=> 15 - 3

= 12

Number of bags = 12/ 0.75

Number of bags = 16

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The advantages of an open question include:

An open question is designed to elicit a broad and unrestricted response from the respondent. It encourages them to think creatively and explore various possibilities, which can lead to the introduction of new solutions. Unlike closed-ended questions that limit respondents to predefined options, an open question provides the freedom to express ideas, perspectives, and insights that may not have been considered before.

Furthermore, an open question allows the respondent to go in-depth with their answer. It prompts them to provide detailed explanations, examples, and personal experiences, allowing for a richer and more nuanced understanding of their thoughts and perspectives. This depth of response can unveil valuable insights, uncover underlying motivations, and provide context that may not have been captured with closed-ended questions. It also encourages active engagement and reflection from the respondent, as they are encouraged to express their thoughts and feelings in a more comprehensive manner.

Overall, open questions promote creativity, critical thinking, and a deeper exploration of ideas, making them advantageous in various contexts such as research, interviews, surveys, and problem-solving discussions.

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Answer:

'x' only has one solution

Step-by-step explanation:

First multiply both sides by 'x^2'

40x = -5x^2

(bring both values to one side and factorize to solve for 'x')

5x^2 +40x=0

5x(x+8)=0

5x= 0 ; x+8 = 0

x=0 ; x=-8

x cannot equal to '0' as zero cannot be a denominator.

Hence, x=-8 is the only correct solution.

So, 'x' only has one solution.

The answer is −63,868. To get this just put it into a calculator.

Answer:

--------------------

Let the number be n, then we have equation:

The number is 3/4.

A good point estimate for the population proportion is 0.01714. Option D is correct.

A good point estimate to use for the population proportion to test the effectiveness of the flu vaccine can be calculated by dividing the number of people who got the flu (12) by the total number of participants in the study (700).

Point Estimate = Number of people who got the flu / Total number of participants

Point Estimate = 12 / 700

Using a calculator, the approximate value of the point estimate is 0.01714 (rounded to five decimal places).

Therefore, the good point estimate to use for the population proportion to test the effectiveness of the flu vaccine is 0.01714. Option D is correct.

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Therefore, the distribution of B(s) + B(t) is a normal distribution with mean 0 and variance 2(t - s).

The distribution of the sum of two independent Brownian motions, B(s) and B(t), where s ≤ t, is itself a normal distribution.

If we consider B(s) and B(t) as two random variables, each following a normal distribution with mean 0 and variance t - s, then their sum B(s) + B(t) will also follow a normal distribution. The mean of the sum will be 0 + 0 = 0, and the variance of the sum will be (t - s) + (t - s) = 2(t - s).

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We would employ the technique of comparing proportions from dependent samples to draw conclusions about whether the proportion of students who have known a cancer survivor is representative of all students at the university.

The presented scenario compares the proportion of university students who have knowledge about cancer survivors to the percentage of all university students. The proper procedure for drawing conclusions would be to compare proportions from dependent samples because the same set of students is being polled (dependent samples).

In order to do this research, the study would gather information from a random sample of students and calculate the percentage of those students who knew a cancer survivor. This percentage would be contrasted with the anticipated percentage of all university students who had known a cancer survivor. We may draw conclusions about the total student body at the university by using statistical tests, such as the McNemar's test, to see if the observed proportion in the sample differs significantly from the expected proportion.

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Complete Question: A University of Florida study asks a random sample of students if they have ever known someone that was a cancer survivor. We want to extend the results to all students at the university. In this problem, we want to make inferences about:

a. comparing proportions from dependent samples

b. comparing proportions from 2 independent samples

c. comparing means from 2 independent samples

d. one mean

e. comparing means from dependent samples

f. one proportion

a) The (9,009, 10,585) range represents the 99% confidence interval for the mean number of steps taken on an average workday for all New York City employees who wear activity trackers. No, we are unable to determine the likelihood of specific values using the confidence interval. Only inferences about the population mean can be drawn from it.

A 99% confidence interval for the mean needs to be calculated.

Since the population standard deviation is unknown, we must infer it from the sample standard deviation in order to get the critical number using a t-students distribution.

Sample Mean(M) = 9,797

Sample Standard Deviation(s) = 2,313.

Sample Size(N) = 61

When σ is unknown, an estimation of σM is made by dividing s by the square root of N:

S = s/√n

S = 2313/√61

S = 2313/7.8102

S = 296.1512

These sample size's degrees of freedom are:

df = n - 1

df = 61 - 1

df = 60

With 61 degrees of freedom and a 99% confidence interval, the t-value is 2.66.

The Margin of Error calculated as:

MOE = t × S

MOE = 2.66 × 296.1512

MOE = 787.7622

The confidence interval's lower and upper bounds are as follows:

Lower Bound = M - MOE

Lower Bound = 9797 - 787.7622

Lower Bound = 9,009.2378

Lower Bound = 9,009(approx)

Upper Bound = M + MOE

Upper Bound = 9797 + 787.7622

Upper Bound = 10,584.7622

Upper Bound = 10,585(approx)

We have a 95% confidence interval between 9,009 and 10,585 steps as the mean number of steps taken on a normal workday for all New York City employees using activity trackers.

b) The value of 8,500 steps is outside the confidence interval, which indicates that it is a high figure for the average number of steps taken by all New Yorkers using activity trackers.

The confidence interval cannot be used to calculate the likelihood of specific values.

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The complete question is:

Activity trackers are electronic devices that people wear to record physical activity. Researchers wanted to estimate the mean number of steps taken on a typical workday for people working in New York City who wear such trackers. A random sample of 61 people working in New York City who wear an activity tracker was selected. The number of steps taken on a typical workday for each person in the sample was recorded. The mean was 9,797 steps and the standard deviation was 2,313 steps.

a. Construct and interpret a 99 percent confidence interval for the mean number of steps taken on a typical workday for all people working in New York City who wear an activity tracker.

b. A wellness director at a company in New York City wants to investigate whether it is unusual for one person working in the city who wears an activity tracker to record approximately 8,500 steps on a typical workday. Is it appropriate to use the confidence interval found in part (a) to conduct the investigation.

The approximate demand when the price is decreased to $2.25 is 4,800 boxes.

We know that demand is inversely proportional to price, so we can set up the following equation:

x ∝ 1/p

If x denotes demand and p denotes price. We can introduce a proportionality constant k to this equation:

x = k/p

Using the information in the problem, we can calculate the value of k. The demand is 1,800 boxes when the price is $6:

1,800 = k/6

Solving for k, we get:

k = 6 x 1800

k = 10,800

Now we can use this value of k to find the demand when the price is $2.25:

x = 10,800/2.25

x ≈ 4,800

Therefore, the approximate demand when the price is $2.25 is 4,800 boxes.

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The probability that the sample mean would be less than 31,358 miles in a sample of 242 tires if the manager is correct is 0.9925 (or 99.25%).

What is probability?

Probability is a measure of the likelihood of an event occurring. It is a number between 0 and 1, where 0 means the event is impossible and 1 means the event is certain to happen.

We can use the central limit theorem to approximate the distribution of the sample mean. According to the central limit theorem, if the sample size is sufficiently large, the distribution of the sample mean will be approximately normal with a mean of 30,641 and a standard deviation of sqrt(variance/sample size).

So, we have:

mean = 30,641

variance = 14,561,860

sample size = 242

standard deviation = sqrt(variance/sample size) = sqrt(14,561,860/242) = 635.14

Now, we need to calculate the z-score corresponding to a sample mean of 31,358 miles:

z = (sample mean - population mean) / (standard deviation / sqrt(sample size))

= (31,358 - 30,641) / (635.14 / sqrt(242))

= 2.43

Using a standard normal distribution table or calculator, we can find the probability that a z-score is less than 2.43. The probability is approximately 0.9925.

Therefore, the probability that the sample mean would be less than 31,358 miles in a sample of 242 tires if the manager is correct is 0.9925 (or 99.25%).

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Answer:

[tex]5 + 2\sqrt{3}[/tex]

    &          

[tex]5-2\sqrt{3}[/tex]

Step-by-step explanation:

Okay! The equation is : 2x²+26=20x

Right off the bat we notice that this can be simplified. We divide all numbers by a common multiple: 2.

Our resulting equation is [tex]x^2 + 13= 10x[/tex]

Now, in order to plug this equation into our quadratic formula, we need to rearrange this equation into the [tex]ax^2 + bx +c = 0[/tex] format.

In order to do that, we simply move the 10x to the left side of the equation, resulting in this: [tex]x^2 - 10x + 13[/tex]

Here is the quadratic formula:

(-b±√(b²-4ac))/ 2a

I will include a picture of the quadratic equation at the bottom (because the typed equation is strange).

So looking at our previously found formula, x^2 - 10x + 13, we know that a: 1

b: -10

c: 13

Now, we plug in our values!

(-(-10) ± √((-10)²-(4(1)(13))) / 2(1)

Simplify! (10 ± √(100-52)) / 2

Simplify again! (10 ± √48) / 2

Now we must simplify the square root. If we try to find the square root of 48, it comes out to 6.92820323, which is a very messy number. We will NOT be using this number. We will instead find the factors of 48.

2·2·2·2·3 = 48

So it looks like this: √2·2·2·2·3

We can pair up the similar numbers, so it looks like: √(2·2)(2·2)·3

Now, we move the pairs of twos to the front of the equation (but only one two from each pair is represented because they've been square-rooted) , and out of the square root, to get us: 2·2 √3, which equals 4√3

Now that we have the square root figured out, we re-enter the square root into the equation we had before (replacing the un-simplified version with the simplified version), which was (10 ± √48) / 2.

Here is the equation with the simplified root:  (10 ± 4√3) / 2

Now we notice that 10 and 4 are divisible by 2, so the equation becomes: (5 ± 2√3), which is 5+2√3, AND 5-2√3

Hope that helped!!!!

The experimental probability is 29/100 and the number of workers that walk is 1102

The experimental probability of an event is based on the number of times the event has occurred during the experiment and the total number of times the experiment was conducted. Each possible outcome is uncertain and the set of all the possible outcomes is called the sample space.

The formula for this is given as;

P(E) = Number of occurrence of an event / Total number of times experiment is carried out.

a. Experimental probability = 29/100

b. To predict the total number of workers that walk, we can go as;

(29/100) * 3800 = 1102

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The Laplace transform of f(t) = 12 cos t - 6 is ℒ{f(t)} = 12s / (s^2 + 1) - 6/s.

To find the Laplace transform ℒ{f(t)} of the function f(t) = 12 cos t - 6, we can apply the Laplace transform property involving the cosine function and a trigonometric identity. The property states:

ℒ{cos(at)} = s / (s^2 + a^2)

Using this property, we can split the Laplace transform into two parts:

ℒ{f(t)} = ℒ{12 cos t} - ℒ{6}

Applying the Laplace transform property to each term:

ℒ{12 cos t} = 12 * ℒ{cos t} = 12 * (s / (s^2 + 1^2)) = 12s / (s^2 + 1)

ℒ{6} = 6 * ℒ{1} = 6 * (1 / s) = 6/s

Combining the two terms, we have:

ℒ{f(t)} = 12s / (s^2 + 1) - 6/s

Therefore, the Laplace transform of f(t) = 12 cos t - 6 is ℒ{f(t)} = 12s / (s^2 + 1) - 6/s.

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The function f(x) = (x - 9)(x + 9)x is an odd function.

Given the function in the question:

f(x) = (x - 9)(x + 9)x

To determine whether the function f(x) = (x - 9)(x + 9)x is even, odd, or neither, we need to check if it satisfies the conditions for even or odd functions.

An even function is symmetric with respect to the y-axis, meaning f(x) = f(-x) for all x in the domain.

An odd function is symmetric with respect to the origin, meaning f(-x) = -f(x) for all x in the domain.

Let's analyze the given function:

f(x) = (x - 9)(x + 9)x

f(x) = x³ - 81x

To check if it's even, we substitute -x for x:

f(x) = x³ - 81x

f(-x) = -x³ + 81x

Since -x³ + 81x is not equal to x³ - 81x, the function is not even.

To check if it's odd, find -f(x):

f(x) = x³ - 81x

-f(x) = -( x³ - 81x )

-f(x) = -x³ + 81x

Since  -x³ + 81x equals -x³ + 81x, the function is odd.

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