Use a table with values x = {−2, −1, 0, 1, 2} to graph the quadratic function y = −2x^

2.

We can express 0.19 as the ratio of integers 1919/10000 and the repeating decimal 0.19191919... as the ratio of integers 1919/1000000.

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The calculated value of x in the triangle is 4.79 feet

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

X

7 feet

43.2°

The value of x in the triangle can be calcuated using the following sine rule

sin(43.2) = x/7

Make x the subject of the above equation

So, we have

x = 7 * sin(43.2)

Evaluate the products

x = 4.79

Hence, the value of x is 4.79 feet

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Rounding to two decimal places, the standard score is -0.02 when the mean µ = 79.2 and standard deviation σ = 74.4

The standard score, also known as the z-score, is a measure of how many standard deviations a given data point is away from the mean of a distribution. It is calculated by subtracting the mean from the data point and then dividing the difference by the standard deviation:

z = (X - µ) / σ

where X is the data point, µ is the mean of the distribution, and σ is the standard deviation.

The standard deviation is a statistical measure that represents the amount of variation or dispersion in a set of data. It is the square root of the variance, which is the average of the squared deviations of each data point from the mean.

The formula for calculating the standard deviation is:

σ = sqrt [ Σ ( Xi - µ )² / N ]

where σ is the standard deviation, Xi is each data point, µ is the mean of the data, and N is the number of data points.

The formula for calculating the standard score (z-score) is:

z = (X - µ) / σ

where X is the given value, µ is the mean, and σ is the standard deviation.

Substituting the given values, we get:

z = (77.4 - 79.2) / 74.4

z = -0.024

Rounding to two decimal places, the standard score is -0.02.

To indicate the location of z on the curve, we can use a graph of the standard normal distribution to locate z. A z-score of -0.02 corresponds to a point on the curve that is slight to the left of the mean, but still very close to it. This can be seen on a graph of the standard normal distribution, where the mean is located at the center of the curve.

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An implicit equation for the plane passing through the points (-5,0,5), (-5,-5,0), and (-8,-5,10) is x - 5y + 3z - 5 = 0.

To find the equation of a plane passing through three points, we can use the following formula:

(x - x1)(y2 - y1)(z3 - z1) + (y - y1)(z2 - z1)(x3 - x1) + (z - z1)(x2 - x1)(y3 - y1) = (x2 - x1)(y3 - y1)(z3 - z1) + (y2 - y1)(z3 - z1)(x3 - x1) + (z2 - z1)(x3 - x1)(y3 - y1)

where (x1, y1, z1), (x2, y2, z2), and (x3, y3, z3) are the given points.

Substituting the given values, we get:

(x + 5)(-5)(10) + (y - 0)(-5)(-8) + (z - 5)(-5)(0) = (y + 5)(-5)(10) + (z - 0)(-5)(-8) + (x + 5)(-5)(0)

Simplifying this equation, we get:

-50x + 50y - 50z + 250 = 0

Dividing both sides by -50, we get:

x - 5y + 3z - 5 = 0

Hence, the implicit equation for the plane passing through the points (-5,0,5), (-5,-5,0), and (-8,-5,10) is x - 5y + 3z - 5 = 0.

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It does not seem possible that the population mean could equal half the sample mean.

In Exercise 36, we're asked if it's possible that the population mean could equal half the sample mean.

Given the data, the sample mean is 4.36%, the standard deviation is 0.75%, and there are 18 months in the random sample.

We'll examine the probability using the z-score formula and normal distribution.

Step 1: Calculate half the sample mean
Half the sample mean is 4.36% / 2 = 2.18%.

Step 2: Calculate the standard error
Standard error (SE) = standard deviation / sqrt(sample size) = 0.75% / √(18) ≈ 0.18%.

Step 3: Calculate the z-score
z = (target population mean - sample mean) / SE = (2.18% - 4.36%) / 0.18% ≈ -12.11.

Step 4: Interpret the z-score
A z-score of -12.11 is extremely low, which means the probability of the population mean being half the sample mean is very close to 0.

In conclusion, based on Exercise 36 data, it does not seem possible that the population mean could equal half the sample mean due to the extremely low probability indicated by the z-score.

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Answer:

To find the probability that the point is in the smaller shaded square, we need to compare the area of the shaded square to the area of the large square.

The area of the large square is 17 cm x 17 cm = 289 cm^2.

The area of the shaded square is 6 cm x 6 cm = 36 cm^2.

Therefore, the probability that a randomly chosen point is in the shaded square is:

Probability = Area of shaded square / Area of large square

Probability = 36 cm^2 / 289 cm^2

Probability = 0.1241 (rounded to four decimal places)

Rounding to the nearest hundredth, the probability is approximately 0.12.

Therefore, the probability that the point is in the smaller, shaded square is 0.12.

The equation of the ellipse centered at (4, 1) with a minor axis of 8 units and a major axis of 10 units parallel to the x-axis is: (x - 4)²/25 + (y - 1)²/16 = 1

To write the equation of the ellipse centered at (4, 1) with a minor axis of 8 units, a major axis of 10 units, and parallel to the x-axis.
We will use the standard equation of an ellipse in the form:
(x - h)²/a² + (y - k)²/b² = 1
Here, (h, k) represents the center of the ellipse, a is the semi-major axis, and b is the semi-minor axis.
Given that the ellipse is centered at (4, 1), we have h = 4 and k = 1.

Since the major axis is 10 units long and parallel to the x-axis, the semi-major axis a is half of that, which is 5 units.

Similarly, the minor axis is 8 units long, so the semi-minor axis b is half of that, which is 4 units.
Now, we can plug these values into the standard equation of an ellipse:
(x - 4)²/5² + (y - 1)²/4² = 1
Simplify the equation to:
(x - 4)²/25 + (y - 1)²/16 = 1
The equation of the ellipse centered at (4, 1) with a minor axis of 8 units and a major axis of 10 units parallel to the x-axis is:
(x - 4)²/25 + (y - 1)²/16 = 1

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The general solution can be expressed as a linear combination of these exponential functions:

[tex]y(t) = c1 e^{(\sqrt(z+1)t)} + c2 e^{(-\sqrt(z+1)t)} + c3 e^{(\sqrt(z+6)t)} + c4 e^{(-\sqrt(z+6)t)}[/tex]

To find the general solution for [tex]y^{(4)} - 5y^m + 6y^n = 0[/tex], we can assume a solution of the form [tex]y = e^{(rt)}[/tex], where r is a constant to be determined. Then, taking the fourth derivative of y gives:

[tex]y^{(4)} = r^4 e^{(rt)}[/tex]

Substituting this into the original equation yields:

[tex]r^4 e^{(rt)} - 5(e^{(rt)})^m + 6(e^{(rt)})^n = 0[/tex]

Dividing through by e^(rt), we get:

[tex]r^4 - 5e^{(rt(m-1))} + 6e^{(rt(n-1))} = 0[/tex]

This is a fourth-order polynomial equation in r. To solve it, we can factor it into two quadratic equations using the quadratic formula:

[tex]r^4 - 5zr^2 + 6 = 0[/tex]

where[tex]z = e^{(t(m-1))}[/tex]

Solving this equation gives four possible values for r:

r = ±√(z+1), ±√(z+6)

Since [tex]y = e^{(rt)},[/tex] the general solution can be expressed as a linear combination of these exponential functions:

[tex]y(t) = c1 e^{(\sqrt(z+1)t)} + c2 e^{(-\sqrt(z+1)t)} + c3 e^{(\sqrt(z+6)t)} + c4 e^{(-\sqrt(z+6)t)}[/tex]

where c1, c2, c3, and c4 are arbitrary constants determined by initial or boundary conditions.

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Answer:      7≤x≤9

Step-by-step explanation:

Explanation is in image but i forgot to write final answer form.  It's up top.

The painting is 75 cm long, if the painting is 45 cm wide.

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

Ratio of the length to the width is 5:3. T

This means that

Length : Width = 5 : 3

The painting is 45 cm wide.

So, we have

Length : 45 = 5 : 3

Express as a fraction

So, we have

Length/45 = 5/3

Evaluate the above expression

so, we have the following representation

Length = 75

Hence, the length is 75

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The exact value of the expression cos(-10pi/3) is -1/2.

To find the exact value of cos(-10pi/3), follow these steps:

1. Determine the equivalent positive angle: Since the cosine function has a period of 2pi, we can add multiples of 2pi to the angle until we get a positive angle. In this case, we add 4pi (since 4pi = 12pi/3) to get the equivalent positive angle:
  (-10pi/3) + (12pi/3) = 2pi/3.

2. Find the cosine value of the positive angle: Now, we find the cosine value of the positive angle 2pi/3. Using the unit circle, we can determine that cos(2pi/3) = -1/2.

So, the exact value of the expression cos(-10pi/3) is -1/2.

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In Problem 4, there are (i) 495 different possible orders for the group when they collectively order four different dishes to share, and (ii) 20,736 different possible orders for the group when each individual orders a main course.

(i) To find the number of ways to order four different dishes out of 12, we use combinations. This is calculated as C(12,4) = 12! / (4! * (12-4)!), which equals 495 possible orders.

(ii) Since there are 12 dishes and each of the four friends can choose any dish, we use permutations. The number of possible orders is 12⁴, which equals 20,736 different orders.

For passwords, there are (i) 306,380,448 passwords of length 7 with at least one digit, and (ii) 282,475,249 passwords of length 7 with at least one digit and one letter.

(i) There are 10 digits and 26 lowercase letters. Total possibilities are (10+26)⁷. Subtract the number of all-letter passwords: 26^7. Result is (36⁷) - (26⁷) = 306,380,448.

(ii) Subtract the number of all-digit passwords from the previous result: 306,380,448 - (10⁷) = 282,475,249 different passwords.

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1)The net change in the value of the function f(x) = 6x - 5 between the given inputs 1 and 6 is 30.

2)The net change in the value of the function g(t) = 1 - t² between the given inputs -4 and 9 is -65.

1. To find the net change in the value of the function f(x) = 6x - 5 between the given inputs 1 and 6:

Follow these steps:

Step 1: Calculate f(1)
f(1) = 6(1) - 5 = 6 - 5 = 1

Step 2: Calculate f(6)
f(6) = 6(6) - 5 = 36 - 5 = 31

Step 3: Find the net change
Net change = f(6) - f(1) = 31 - 1 = 30

The net change in the value of the function f(x) = 6x - 5 between the given inputs 1 and 6 is 30.

2. To find the net change in the value of the function g(t) = 1 - t² between the given inputs -4 and 9:

Follow these steps:

Step 1: Calculate g(-4)
g(-4) = 1 - (-4)² = 1 - 16 = -15

Step 2: Calculate g(9)
g(9) = 1 - 9² = 1 - 81 = -80

Step 3: Find the net change
Net change = g(9) - g(-4) = -80 - (-15) = -80 + 15 = -65

The net change in the value of the function g(t) = 1 - t² between the given inputs -4 and 9 is -65.

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The linear relationship between x = year and y = profit is y = 4x + 2.

The company's profit at the end of 2 years is $10 million.

The company's profit at the end of 5 years is $22 million.

In Mathematics and Geometry, the point-slope form of a straight line can be calculated by using the following mathematical expression:

y - y₁ = m(x - x₁)

Where:

First of all, we would determine the slope of this line;

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

Slope (m) = (14 - 6)/(3 - 1)

Slope (m) = 8/2

Slope (m) = 4

At data point (1, 6) and a slope of 4, a linear equation for this line can be calculated by using the point-slope form as follows:

y - y₁ = m(x - x₁)

y - 6 = 4(x - 1)  

y = 4x - 4 + 6

y = 4x + 2

When x = 2 years, the profit is given by;

y = 4(2) + 2 = $10 million

When x = 5 years, the profit is given by;

y = 4(5) + 2 = $22 million.

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Answer:

  y(x) = -(2/e)x +3

Step-by-step explanation:

You want the equation of the line tangent to the parametric curve at t=1.

  (x, y) = (e^(√t), t -2·ln(t))

At t=1, the point of tangency is ...

  (x, y) = (e^(√1), 1 -2·ln(1)) = (e, 1)

The derivatives with respect to t are found using the chain rule:

  dx = d(e^u)du = d(e^√t)(1/(2√t))dt

  dx = (e^√t)/(2√t))·dt

  dy = (1 -2/t)·dt

Then the slope of the tangent line is ...

  m = dy/dx = (1 -2/t)(2√t)/e^√t

For t=1, this is ...

  m = (1 -2/1)(2√1)/(e^1) = -2/e

The equation for a line with slope m through point (h, k) is ...

  y = m(x -h) +k

The equation for a line with slope -2/e through point (e, 1) is ...

  y = (-2/e)(x -e) +1

  y = (-2/e)x +3

Answer:

  y(x) = -(2/e)x +3

Step-by-step explanation:

You want the equation of the line tangent to the parametric curve at t=1.

  (x, y) = (e^(√t), t -2·ln(t))

At t=1, the point of tangency is ...

  (x, y) = (e^(√1), 1 -2·ln(1)) = (e, 1)

The derivatives with respect to t are found using the chain rule:

  dx = d(e^u)du = d(e^√t)(1/(2√t))dt

  dx = (e^√t)/(2√t))·dt

  dy = (1 -2/t)·dt

Then the slope of the tangent line is ...

  m = dy/dx = (1 -2/t)(2√t)/e^√t

For t=1, this is ...

  m = (1 -2/1)(2√1)/(e^1) = -2/e

The equation for a line with slope m through point (h, k) is ...

  y = m(x -h) +k

The equation for a line with slope -2/e through point (e, 1) is ...

  y = (-2/e)(x -e) +1

  y = (-2/e)x +3

The probability that the three I's are consecutive when the letters of ILLINI are randomly ordered is 1/5.

To find the probability that the three I's in ILLINI are consecutive, first consider the three I's as a single unit (III). Now, you have 4 objects to arrange: L, N, and the III unit. There are 4! (4 factorial) ways to arrange these objects, which is equal to 24.

Next, determine the total number of ways to arrange the letters in ILLINI without any constraints. There are 6! (6 factorial) ways to arrange 6 objects, but we must account for the repetitions of I. To do this, divide by the number of ways the I's can be arranged within themselves, which is 3! (3 factorial). Therefore, the total arrangements are 6! / 3!, which equals 720 / 6 = 120.

Now, divide the number of arrangements with consecutive I's by the total number of arrangements: 24 / 120. Simplify this fraction to obtain the probability:

24 / 120 = 1 / 5

The probability that the three I's are consecutive when the letters of ILLINI are randomly ordered is 1/5.

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The joint pdf of y1, y2, and y3 is f(y1, y2, y3) = 2[tex]e^(^-^y^1^-^y^3^)[/tex](y1y3)⁻². They are not mutually independent, as their joint pdf cannot be factored into individual pdfs of y1, y2, and y3.

To find the joint pdf, first note the transformations: x1 = y3/y1, x2 = y3/y2, and x3 = y1y2y3. The Jacobian of this transformation is |J| = |(∂(x1, x2, x3)/∂(y1, y2, y3))| = |2y1y2y3²|.

Next, find the joint pdf of x1, x2, and x3: f(x1, x2, x3) = [tex]e^-^x^1e^-^x^2e^-^x^3[/tex] , since they are i.i.d. with exp(1) distribution. Now, apply the transformation and Jacobian: f(y1, y2, y3) = f(x1, x2, x3)|J| =  [tex]e^-^x^1e^-^x^2e^-^x^3[/tex] (2y1y2y3²) = 2[tex]e^(^-^y^1^-^y^3^)[/tex](y1y3)⁻². As the joint pdf cannot be factored into individual pdfs of y1, y2, and y3, they are not mutually independent.

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Answer:

Number 3 and 4 are correct, but I have no clue about 1 or 2.

Step-by-step explanation:

I'm just gonna start with number 4

if you put 7/2 into decimals you get 3.5    7/2 is greater than 3

number 3.   -4 is in the negative zone, so it is less than 15 which is positive

if I were you, I would guess that number 1 is false. but i cant be sure

The limit of 4 cos(x) as x approaches infinity does not exist (DNE).

To find the limit:

Cosine is an oscillatory function that oscillates between -1 and 1.

As x approaches infinity, the argument of the cosine function keeps increasing, causing the function to oscillate infinitely between -4 and 4.

Therefore, the limit does not exist.

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The possible values of x is 100.498cm. So the hypotenuse will be 1004.98cm.

We can use the Pythagorean theorem to solve for x in terms of the height and base of the triangle:

h² + b² = c²

where h is the height, b is the base, and c is the hypotenuse.

Substituting the given values, we get:

(10000)² + (1000)² = (10x)²

Simplifying:

100,000,000 + 1,000,000 = 100x²

101,000,000 = 100x²

Dividing by 100:

1,010,000 = x²

Taking the square root of both sides:

x = ±√1,010,000

x ≈ ±100.498

Therefore, there are two possible values of x: approximately ± 100.498 and . However, since the length of a side of a triangle cannot be negative, the only valid solution is x ≈ 100.498

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Okay, let's break this down step-by-step:

We have data on whether a subject lied (L) or told the truth (T), and whether the polygraph test indicated they lied (L) or told the truth (T).

So we have 4 possible outcomes:

LL: Subject lied, test indicated lied

LT: Subject lied, test indicated truth

TL: Subject told truth, test indicated lied

TT: Subject told truth, test indicated truth

We want to test the null hypothesis that a subject's truthfulness is independent of the polygraph test result.

So we need to calculate a test statistic that would allow us to determine if the observed frequencies of the 4 outcomes deviate significantly from what we would expect if the null hypothesis is true.

A good test for this is the chi-square test of independence. Here are the steps:

1) Calculate the expected frequency for each cell, assuming independence. This is (row total * column total) / total sample size.

2) Calculate the observed frequency for each cell from the data.

3) Square the difference between observed and expected for each cell.

4) Sum the squared differences across all cells. This gives you the chi-square statistic.

5) Compare the chi-square statistic to the critical value for 3 degrees of freedom at your desired alpha level (typically 0.05).

If the chi-square statistic exceeds the critical value, we reject the null hypothesis of independence. Otherwise, we fail to reject it.

Does this make sense? Let me know if you have any other questions! I can also walk you through an example if this would be helpful.

The general solution to the homogeneous differential equation (d²y/dt²)−18(dy/dt)+97y=0 is y(t) = C₁ [tex]e^3^t[/tex] cos(8t) + C₂ [tex]e^3^t[/tex]sin(8t).

To solve the given differential equation, first, we need to find the characteristic equation by replacing d²y/dt² with r², dy/dt with r, and y with 1. This gives us the quadratic equation r² - 18r + 97 = 0.

Next, find the roots of the characteristic equation using the quadratic formula, which yields r = 3 ± 8i.

Since the roots are complex conjugates, the general solution to the homogeneous differential equation takes the form y(t) = [tex]e^\alpha^t[/tex](C₁cos(βt) + C₂sin(βt)), where α and β are the real and imaginary parts of the complex roots, respectively. In this case, α = 3 and β = 8. Substituting these values, we obtain the general solution y(t) = C₁ [tex]e^3^t[/tex]cos(8t) + C₂ [tex]e^3^t[/tex]sin(8t).

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The ratio of their areas is (3:8)² which simplifies to 9:64.

Area of smaller circle is 256/9 π.

The ratio of their perimeters is 5:3 since they are regular polygons with proportional side lengths.

The ratio of the areas of two similar polygons is equal to the square of the ratio of their corresponding sides. Since the scale factor of the polygons is 3:8, the ratio of their corresponding sides is 3:8. Therefore, the ratio of their areas is (3:8)^2, which simplifies to 9:64.

The area of a circle is proportional to the square of its radius. Let r be the radius of the smaller circle, then the radius of the larger circle is 3/2 times r. The area of the larger circle is given as 64π, so (3/2)^2 times the area of the smaller circle must also equal 64π. Solving for the area of the smaller circle, we get:

(9/4)πr^2 = 64π

r^2 = (64/9) * (4/π)

r^2 = 256/9π

Area of smaller circle = πr^2 = π * (256/9π) = 256/9 π.

The ratio of the areas of two regular polygons is equal to the square of the ratio of their side lengths. Let s1 and s2 be the side lengths of the first and second pentagons, respectively. Then we have:

Area of first pentagon / Area of second pentagon = (s1^2 / s2^2)

We are given the areas of the two pentagons, so we can plug them in and simplify:

150√3 / 54√3 = (s1² / s2²)

25 / 9 = (s1^2 / s2^2)

s1 / s2 = √(25/9) = 5/3

Therefore, the ratio of their perimeters is 5:3 since they are regular polygons with proportional side lengths.

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the probability that 1.20 ≤ z ≤ 1.85 is approximately 0.0822.To find the probability that 1.20 ≤ z ≤ 1.85, we need to use the standard normal distribution table or calculator.

First, we find the area to the left of 1.85 in the standard normal distribution table, which is 0.9671. Then, we find the area to the left of 1.20 in the standard normal distribution table, which is 0.8849.

To find the probability that 1.20 ≤ z ≤ 1.85, we subtract the area to the left of 1.20 from the area to the left of 1.85:

0.9671 - 0.8849 = 0.0822

Therefore, the probability that 1.20 ≤ z ≤ 1.85 is approximately 0.0822.

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The given differential equation is an Euler equation, the general solution is y = c1 + c2/[tex]x^4[/tex] and the singular point of the differential equation is x = 0

You are correct, this is an Euler equation. To solve it, we can make the substitution y = [tex]x^r[/tex]. Then we have:

Substituting these into the original equation, we get:

x²(r(r-1)[tex]x^(^r^-^2^)[/tex]) + 5x(r[tex]x^(^r^-^2^)[/tex]) + 4[tex]x^r[/tex]= 0

Simplifying, we have:

r(r+4)[tex]x^r[/tex] = 0

Since [tex]x^r[/tex] is never zero, we must have r(r+4) = 0. This gives us two possible values for r: r = 0 and r = -4.

Thus, the general solution is:

y = c1 + c2/[tex]x^4[/tex]

This solution is valid in any interval not including the singular point x = 0, which is the singular point of the differential equation.

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In linear algebra, the determinant is a scalar value that can be computed from a square matrix.

To find the values of k for which the system has a nontrivial solution, we need to first analyze the given system of linear equations:

x1 + kx2 = 0
kx1 + 9x2 = 0

A nontrivial solution means there exists a solution where x1 and x2 are not both equal to zero. We can find such solutions by finding the determinant of the coefficients matrix and setting it equal to zero:

| 1   k |
| k   9 |

The determinant is calculated as follows:

Determinant = (1 * 9) - (k * k) = 9 - k^2

For a nontrivial solution, the determinant must be equal to zero:

9 - k^2 = 0

Now, solve for k:

k^2 = 9
k = ±3

So the values of k for which the system has a nontrivial solution are k = -3 and k = 3. Your answer: -3, 3

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The rational function is expressed as the sum of two simpler rational expressions.

To express the rational function as a sum or difference of two simpler rational expressions, we'll work with the given function:

[tex](44x^2 - 6x^4 + 4x^3 + 3x - 79) / ((x + 1)(x^2 - 4)^2)[/tex]
First, let's simplify the denominator:

Denominator =[tex](x + 1)(x^2 - 4)^2 = (x + 1)((x + 2)(x - 2))^2[/tex]

Now, let's express the numerator as the sum of two simpler expressions:

Numerator =[tex]-6x^4 + 4x^3 + 44x^2 + 3x - 79[/tex]

We can separate the terms with x^3 and x^2, and those with x and the constant:

Numerator = [tex](-6x^4 + 44x^2) + (4x^3 + 3x - 79)[/tex]
Now we have:

Function =[tex]((-6x^4 + 44x^2) + (4x^3 + 3x - 79)) / ((x + 1)((x + 2)(x - 2))^2)[/tex]

Thus, the rational function is expressed as the sum of two simpler rational expressions.

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The equation shows that the height of the stack is directly proportional to the number of cups in the stack, with a proportionality constant of 2 cm.

The stack of 8 cups is 16 cm tall.

To determine the height of 1 cup, we can divide the height of the stack (16 cm) by the number of cups (8):

1 cup = 16 cm ÷ 8 cups = 2 cm

The general relationship between the height of the stack (h) and the number of cups in the stack (n) can be expressed as:

h = n × 2 cm

Thus, this equation shows that the height of the stack is directly proportional to the number of cups in the stack, with a proportionality constant of 2 cm.

For more details regarding proportionality constant, visit:

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