38. Make a stem and left plot of following data of Video game scores:
{542, 529, 564, 531, 456, 540, 522, 548, 531}

William owes a total of $10,142.84.  To calculate this, we first need to determine the total interest paid over the 3-year period.

Using the formula A = P(1 + r/n)^(nt), where:
A = the final amount owed
P = the principal amount borrowed (in this case, $9000)
r = the interest rate (4.5%)
n = the number of times the interest is compounded per year (annually in this case)
t = the number of years (3 in this case)

We can plug in the values:
A = 9000(1 + 0.045/1)^(1*3)
A = 9000(1 + 0.045)^3
A = 9000(1.1412)
A = 10,270.88

This gives us the total amount owed after 3 years. But we only want to know the principal plus interest, so we subtract the original amount borrowed:

10,270.88 - 9000 = 1270.88

Therefore, William owes a total of $10,142.84 (rounded to the nearest cent).

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The probability that both professors are chemistry professors is 0.467.

The cost of a Statistics book is a continuous variable because it can take any value within a given range, including decimals, and is not limited to specific, separate values.

For the probability question, there are 10 professors in total (3 statistics + 7 chemistry), and the organization needs 2 advisors. The probability of choosing two chemistry professors can be calculated using the formula: P(Chemistry) = (Number of Chemistry professors) / (Total Number of professors).

First, find the probability of selecting a chemistry professor for the first advisor:
P(First Chemistry) = 7/10.

Next, find the probability of selecting a chemistry professor for the second advisor, considering one chemistry professor has already been selected:
P(Second Chemistry) = 6/9.

Now, multiply both probabilities together to get the probability of selecting two chemistry professors:
P(Both Chemistry) = P(First Chemistry) × P(Second Chemistry) = (7/10) × (6/9) = 0.467.

So, the probability that both professors are chemistry professors is 0.467.

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The value of the given input function for F(x) = 12/x + 1/2 is found to be 4.5, -0.5, 36.5 and 16 is respectively.

To find the values of the function F(x) for the given inputs, we simply substitute the inputs into the formula,

F(x) = 12/x + 1/2

a) F(3)

Substituting x = 3, we get,

F(3)

= 12/3+1/2

= 4+0.5

= 4.5

b) F(-12)

Substituting x = -12, we get,

F(-12) = 12/(-12)+1/2

=-1+0.5

= -0.5

c) F(1/3)

Substituting x = 1/3, we get,

F(1/3)

= 12/(1/3)+1/2

= 36+0.5

= 36.5

d) F(3/4)

Substituting x = 3/4, we get:

F(3/4)

= 12/(3/4)+1/2

= 16+0.5

= 16.5

The above are the value of all the given input functions.

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Complete question - The function F is defined by F(x)= 12/x + 1/2 . Use this formula to find the following values of the function.

F(3)

F(−12)

F( 1/3 )

F( 3/4 )

The only options that are quadratic functions are:

Option A:  5x² + 15 x = 0

Option C: x² - 4x = 4 x + 7

Option E: 3x² + 5 x - 7 = 0

The general form of expression of quadratic functions is:

y = ax² + bx + c

where:

a, b, and c are numbers with a not equal to zero.

The graph of a quadratic function is a curve called a parabola.

Looking at the given options, it is clear that:

6 x - 1 = 4x + 7 is not a quadratic equation because it has only one degree.

2 x - 1 = 0 is a linear equation and not a quadratic equation

x³ - 2 x² + 1 = 0 is a cubic polynomial as it has three degrees.

Thus, only options A, C and E are quadratic equations with two degrees.

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However, in some cases, the default location of the click point may be set by default to the top-left corner of the screen or window, which would correspond to the coordinate (0, 0) in a Cartesian coordinate system.

If no coordinates have been assigned to the cursor, the default location of the click point will depend on the program or application being used. In most cases, the default location will be the center or starting position of the screen or window in which the program is running, which could be any location on the screen. Therefore, none of the options provided is necessarily correct.

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The solution is : the probability, to the nearest 10th of a percent, that both marbles drawn will be green will be 0.053.

Here, we have,

n(r) = 7

n(b) = 8

n ( g) = 5

Total number of marbles = 20

The probability that both marbles drawn will be green will be

The probability of the first being green = 5/20 and the probability that the second marble is green = 4/19.

We will multiply the two together , we have

5/20 x 4/19

= 20/380

= 0.05263157895

Therefore : the probability, to the nearest 10th of a percent, that both marbles drawn will be green will be 0.053

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The value of the indicated angle is 128⁰.

The value of the indicated angle is calculated applying intersecting chord theorem as shown below.

The tangent angle formed outside the circumference is equal to the angle formed by the intersection of the chords at the center.

Angle adjacent the indicated angle = 52⁰ (intersecting chord theorem)

The value of the indicated angle is calculated as follows;

52⁰ + ? = 180 ( sum of angles on a straight line )

? = 180 - 52⁰

? = 128⁰

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One possible null hypothesis for this paired sample study could be: "There is no significant difference in the amount of caffeine (in milligrams) ingested before and after lunch among the 45 volunteer citizens from the small community."

Based on your question, we can construct a null hypothesis for this paired sample study involving 45 volunteer citizens from a small community. The terms "studies," "samples," and "small" are included in the context of the question. Here's a possible null hypothesis:
Null Hypothesis (H0): There is no significant difference in the mean amount of caffeine ingested by the 45 volunteer citizens before and after lunch each day.

The null hypothesis is a statistical assumption that says there is no statistical significance in a group of observations. Hypothesis testing is used to test the reliability of a hypothesis using sample data. It is sometimes called "blank" and stands for H0. The null hypothesis, also known as the Conjecture, is used in quantitative analysis to test a theory about business, investment, or the economy to determine whether the idea is true or false.

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If {v1, v2, v3} is an orthonormal basis for a subspace W of a vector space V, then multiplying v3 by a non-zero scalar c does not necessarily give a new orthonormal basis for W.

To see why, consider the dot product of cv3 with itself. If v3 is an orthonormal vector, then its norm is 1, so the dot product of cv3 with itself is (cv3) • (cv3) = c^2(v3 • v3) = c^2(1) = c^2. Thus, cv3 has a norm of |c|, rather than 1, and so it cannot be an element of an orthonormal basis for W.

However, multiplying v3 by a scalar does give a new basis for W. Specifically, {v1, v2, cv3} is a basis for W if c is non-zero, since v1 and v2 are orthogonal to cv3, and any vector in W can be written as a linear combination of these three vectors. But this new basis is not orthonormal, since cv3 has a norm of |c|. To obtain an orthonormal basis from this new basis, we can normalize each vector in the basis by dividing it by its norm.

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The surface area of the pylon, obtained by considering the pylon as a composite figure consisting of a prism and a pyramid is 1824 square inches

A composite figure is a figure that consists of two or more regular or simpler figures.

The surface area of the pylon can be considered as a composite figure consisting of a square prism and a pyramid

The surface area of the accessible part of the square pyramid is; A = 2 × (30 × 12 + 30 × 12 + 12 × 12) - 12 × 12 = 1584

The surface area of the square pyramid part is 1584 in²

The surface area of the prism, A = 4 × (1/2) × 12 × 10 = 240

The surface area of the prism is 240 in²

The surface area of the pylon is therefore;

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The dimensions of this rectangle are 6 units by 7 units.

The coordinates of the new point is (3, -3).

The length of the line segment with end points A and B is 7 units.

The length of the line segment with end points C and D is 11 units.

In order to determine the dimensions of this rectangle, we would use the distance formula. In Mathematics, the distance between two (2) points that are on a coordinate plane can be calculated by using this formula:

Distance = √[(x₂ - x₁)² + (y₂ - y₁)²]

Distance AB = √[(5 + 1)² + (4 - 4)²]

Distance AB = √[36 + 0]

Distance AB = 6 units

For the width, we have:

Distance AC = √[(-1 + 1)² + (4 + 3)²]

Distance AC = √[0 + 49]

Distance AC = 7 units.

In Mathematics and Geometry, a reflection over the x-axis is modeled by this transformation rule;

(x, y)            →      (-x, y)

New point = (-3, -3) →  (3, -3).

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Complete Question:

The coordinates of the vertices of a rectangle are (-1, 4), (5, 4), (5, -3), and (-1, -3). What are the dimensions of this rectangle?

Sampling in statistics provides us with data to make inferences about a larger population. It helps to reduce uncertainty and allows for more efficient data analysis. As the sample size increases, the variability decreases, making it easier to estimate population parameters. Remember, though, that not every sample is normally distributed, and sample parameters can still vary.

Sampling in statistics refers to the process of selecting a subset of individuals or objects from a larger population in order to make inferences or draw conclusions about the population. One true statement about sampling in statistics is that sample values are estimated from known population parameters. This means that statistical analysis is based on the assumption that the sample is representative of the population and that the values obtained from the sample can be used to estimate the values in the population. Another true statement is that as the sample size increases, the variability decreases. This is because larger samples are more likely to include a diverse range of individuals or objects, which can help to reduce the impact of outliers or unusual values. However, it is important to note that variability can still exist in larger samples, and statistical techniques such as standard deviation and confidence intervals can be used to assess the level of uncertainty. It is also important to note that not every sample is normally distributed, and techniques such as bootstrapping or non-parametric tests may be necessary in such cases. Overall, sampling is a crucial aspect of statistical analysis, and careful consideration of sample size and representativeness is essential for obtaining accurate and meaningful results.
In statistics, sampling is a method used to gather data from a subset of a larger population, allowing us to make inferences about the whole population. Sampling is important because it enables us to collect and analyze data in a more efficient and cost-effective manner, rather than attempting to study the entire population.
As the sample size increases, the variability of the sample typically decreases. This means that larger samples provide more accurate estimates of population parameters, reducing the uncertainty associated with making inferences. However, it is important to note that sample parameters can still vary and are not always known, which is why we use statistical techniques to estimate them.
Sample values are indeed estimated from known population parameters, and these estimates help us to understand the underlying population characteristics. However, it is not accurate to say that every sample is normally distributed. The distribution of a sample depends on the characteristics of the population and the sampling method employed.
In conclusion, sampling in statistics provides us with data to make inferences about a larger population. It helps to reduce uncertainty and allows for more efficient data analysis. As the sample size increases, the variability decreases, making it easier to estimate population parameters. Remember, though, that not every sample is normally distributed, and sample parameters can still vary.

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The value of each variable in the given circle are:

a = 65.5°    b = 90°    c = 49°

In order to find the value of each variable in the given circle, recall the following:

Find a:

a = 1/2(131)

a = 65.5°

Find b:

b is an inscribed angel of half of the circle, therefore:

b = 90°

Find c:

c = 180 - 131

c = 49°

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13 is the value of z from the given figure.

The properties of the triangle are:

From the given figure,

∠ABE + ∠EBC =. 180

∠EBC = 180- ∠ABE

∠EBC = 180 - 9z -----(1)

∠ECB + 115 = 180

∠ECB = 65-----(2)

IN ∆EBC

∠BEC + ∠ECB + ∠EBC = 180

4Z + 180- 9Z + 65 = 180 ---------(from eq i & ii)

-5Z = -65

Z = -65/-5y

Z = 13

The value of z from the given figure is 13.

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Complete question:

[tex]\angle AQO + \angle OQB = 120^\circ$, so $\boxed{\theta = 60^\circ}$[/tex] is the solution.

Let's first draw a diagram to visualize the problem:

Since [tex]$\triangle ABC$[/tex] is isosceles, we have [tex]$\angle BAC = \angle BCA = \theta$[/tex] and [tex]$\angle ABC = 180^\circ - 2\theta$[/tex]. Let O be the center of the circle, and let D and E be the points of tangency of the tangents through A and C, respectively.

Since [tex]$AD$[/tex] and [tex]$CE$[/tex] are tangents to the circle, we have [tex]$OD \perp AD$[/tex] and [tex]$OE \perp CE$[/tex]. Since [tex]$AO$[/tex] and [tex]$CO$[/tex] are radii of the circle, we have [tex]$AO \perp BC$[/tex] and [tex]$CO \perp AB$[/tex].

Therefore, [tex]$OD \parallel CO$[/tex] and [tex]$OE \parallel AO$[/tex]. It follows that [tex]$\angle DOB = \angle COB = \theta$[/tex], and [tex]$\angle EOA = \angle AOB = \theta$[/tex].

Thus, [tex]$\angle DOA = \angle EOC = \theta$[/tex], and [tex]$\angle AOE = \angle DOC = \theta$[/tex].

Now, consider the quadrilateral [tex]$AODE$[/tex]. Since [tex]$\angle AOE = \angle DOA = \theta$[/tex], we have [tex]$\angle OAE = \angle ODE = 90^\circ - \theta$[/tex]. Similarly, [tex]$\angle OCE = \angle OED = 90^\circ - \theta$[/tex]. Since [tex]$\triangle ABC$[/tex] is isosceles, we have [tex]$AB = BC$[/tex], so [tex]$AD = EC$[/tex].

It follows that [tex]$\triangle AOD \cong \triangle CEO$[/tex] by SAS congruence.

Therefore, [tex]$AO = CO$[/tex], so [tex]$\triangle AOB$[/tex] and [tex]$\triangle COB$[/tex] are congruent by SAS congruence.

Thus, [tex]$AB = BC$[/tex], so [tex]$\triangle ABC$[/tex] is equilateral.

Therefore, [tex]$\theta = 60^\circ$[/tex].

Finally, since [tex]$\angle AOB = \theta = 60^\circ$[/tex], we have [tex]$\frac{1}{2}\angle APB = \theta = 60^\circ$[/tex], so [tex]$\angle APB = 120^\circ$[/tex].

Therefore, [tex]$\angle APQ = \angle BPQ = \frac{1}{2}(180^\circ - \angle APB) = 30^\circ$[/tex]. Since [tex]$\triangle APQ$[/tex] is isosceles, we have [tex]$\angle QAP = \angle QPA = \frac{1}{2}(180^\circ - \angle APQ) = 75^\circ$[/tex].

Therefore, [tex]$\angle AQP = \angle BQP = 105^\circ$[/tex], so [tex]$\angle AQB = 2\angle BQP = 210^\circ$[/tex].

Thus, [tex]$\angle AQO = \frac{1}{2}(360^\circ - \angle AQB) = 75^\circ$[/tex], and [tex]$\angle OQB = \frac{1}{2}(180^\circ - \angle AQB) = 45^\circ$[/tex].

Therefore, [tex]\angle AQO + \angle OQB = 120^\circ$, so $\boxed{\theta = 60^\circ}$[/tex] is the solution.

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So the probability that Joe will not receive a text in the next 10 minutes is approximately 0.865. So the probability that the next text arrives between 9:07 and 9:10 p.m. is approximately 0.149. So the probability that a text arrives before 9:03 p.m. is approximately 0.393. So the probability that no text will arrive for 7 minutes, given that no text has arrived for 5 minutes, is approximately 0.394.

(a) To find the probability that Joe will not receive a text in the next 10 minutes, we can use the cumulative distribution function (CDF) of the exponential distribution. The CDF gives the probability that the time until the next text is less than or equal to a given time t. The CDF of an exponential distribution with mean 5 minutes is:

[tex]F(t) = 1 - e^{(-t/5)}[/tex]

To find the probability that Joe will not receive a text in the next 10 minutes, we need to find F(10):

[tex]F(10) = 1 - e^{(-10/5)}[/tex]

[tex]= 1 - e^{(-2)}[/tex]

≈ 0.865

(b) To find the probability that the next text arrives between 9:07 and 9:10 p.m., we need to find the probability that the time until the next text is between 7 and 10 minutes. We can use the CDF again to find this probability:

P(7 < X < 10) = F(10) - F(7)

[tex]= (1 - e^{(-10/5)}) - (1 - e^{(-7/5)})[/tex]

[tex]= e^{(-7/5)} - e^{(-2)}[/tex]

≈ 0.149

(c) To find the probability that a text arrives before 9:03 p.m., we need to find the probability that the time until the next text is less than 3 minutes. We can use the CDF again to find this probability:

P(X < 3) = F(3)

[tex]= 1 - e^{(-3/5)}[/tex]

≈ 0.393

(d) To find the probability that no text will arrive for 7 minutes, given that no text has arrived for 5 minutes, we can use the memoryless property of the exponential distribution. The memoryless property states that the conditional distribution of the time until the next text, given that no text has arrived in the first 5 minutes, is the same as the original distribution. In other words, the fact that no text has arrived in the first 5 minutes does not affect the probability of a text arriving in the next 7 minutes.

Therefore, the probability that no text will arrive for 7 minutes, given that no text has arrived for 5 minutes, is the same as the probability that no text will arrive for 7 minutes starting from scratch. This is the probability that the time until the next text is greater than 7 minutes. Using the CDF of the exponential distribution, we can calculate:

P(X > 7) = 1 - F(7)

[tex]= 1 - (1 - e^{(-7/5)})[/tex]

= [tex]e^{(-7/5)}[/tex]

≈ 0.394

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Therefore, the probability that Sayan can go on the trip without having to replace the hard drive during the trip is approximately 0.868.

Since the number of hours that a computer hard drive can run before it conks off is exponentially distributed with an average value of 5 years, we can use the following exponential probability density function:

f(x) = (1/μ) * exp(-x/μ)

where x is the number of hours, μ is the mean (or average) number of hours, and exp() is the exponential function.

In this case, μ = 5 years * 12 months/year = 60 months. We want to find the probability that the hard drive will not fail during an 8 month trip, given that it has already been in use for 3 years (or 36 months).

Let X be the number of months the hard drive lasts. Then, X is exponentially distributed with mean μ = 60 months. We want to find P(X > 8 + 36 | X > 36).

Using the memoryless property of the exponential distribution, we have:

P(X > 8 + 36 | X > 36) = P(X > 8)

= exp(-8/60)

≈ 0.868

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we know that

P (A or B) = P(A) + P(B) -P (A and B)

putting values we get

P (A or B) = 0.2 + 0.3 - 0.1

P (A or B)= 0.4

hence the ans. = 0.4

When the width is 4 inches, the area of the photograph is 20 square inches.

To write a polynomial that represents the area of the photograph, we need to use the formula for the area of a rectangle, which is A = l x w (where A is the area, l is the length, and w is the width).

From the given information, we know that the length (l) is 3 inches less than twice the width (w). So, we can write:

l = 2w - 3

Substituting this expression for l into the formula for the area, we get:

A = (2w - 3) x w

Simplifying this expression, we get:

A = 2w^2 - 3w

This is the polynomial that represents the area of the photograph.

To find the area of the photograph when the width is 4 inches, we simply need to substitute w = 4 into the polynomial we just found:

A = 2(4)^2 - 3(4)
A = 32 - 12
A = 20

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Point E to point B and point B to Point E matches will you move between if you move 3 units left and 4 units down

To determine which two points you will move between if you move 3 units left and 4 units down, first let's look at the coordinates of each point:

Point A: (8, 3)

Point B: (9, 10)

Point C: (3, 9)

Point D: (2, 1)

Point E: (6, 6)

Now, let's move 3 units left and 4 units down for each point and find the new coordinates:

Point A: (8 - 3, 3 - 4) = (5, -1)

Point B: (9 - 3, 10 - 4) = (6, 6)

Point C: (3 - 3, 9 - 4) = (0, 5)

Point D: (2 - 3, 1 - 4) = (-1, -3)

Point E: (6 - 3, 6 - 4) = (3, 2)

Point A to Point E: (5, -1) to (3, 2) - No match

Point B to Point C: (6, 6) to (0, 5) - No match

Point B to Point E: (6, 6) to (3, 2) - This matches the movement between Point B and Point E

Point E to Point B: (3, 2) to (6, 6) - This matches the movement between Point E and Point B

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Answer:

To find the solutions to this system of equations, we need to set f(x) equal to each other and solve for x.

x² - 2x - 15 = -x - 9

Simplifying and solving for x, we get:

x² - x - 6 = 0

Factoring the left side, we get:

(x - 3)(x + 2) = 0

So, the solutions are x = 3 and x = -2.

To find the corresponding y values, we can plug these x values back into either of the original equations. Using f(x) = x² - 2x - 15, we get:

f(3) = 3² - 2(3) - 15 = -3

f(-2) = (-2)² - 2(-2) - 15 = -9

Therefore, the ordered pair solutions for the system of equations are (3, -3) and (-2, -9).

The balance after 12 years with an interest rate of 8.4% compounded monthly on $6500 is $7,046

The Amount after compound interest is calculated by

[tex]A=P(1+\frac{r}{n})^t[/tex]

where A is the Amount

P is the Principal

r is the Interest rate (in decimals)

n is the frequency at which the interest is compounded per year

t is the Time duration

According to the question,

Principal = $6500

interest rate = 8.4% compound monthly

Since interest is compounded monthly, n = 12

Time duration = 12 years

Therefore, A = [tex]6500(1+\frac{0.084}{12})^{12}[/tex]

= 6500 (1.007[tex])^{12[/tex]

= 6500 * 1.084

= $7,046

Hence, the balance is $7,046.

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The perimeter of the bottom of the storage container is,

⇒ 24 feet

We have to given that;

The storage container has a length of 7 feet and a width of 5 feet.

Hence, we get;

The perimeter of the bottom of the storage container is,

⇒ 2 (7 + 5)

⇒ 2 × 12

⇒ 24 feet

Thus, The perimeter of the bottom of the storage container is,

⇒ 24 feet

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The solution of the logarithmic equation log16 - log8(x -5) is 55.

We can use the following logarithmic property to simplify the left side of the equation:

log a - log b = log (a/b)

Using this property, we can rewrite the left side of the equation as:

log (16/8(x-5)) = log (2(x-5))

So the equation becomes:

log (2(x-5)) = 2

To solve for x, we need to use another logarithmic property:

log a = b if and only if a = 10ᵇ

Using this property, we can rewrite the equation as:

2(x-5) = 10²

Simplifying:

2x - 10 = 100

2x = 110

x = 55

Therefore, the solution to the equation is x = 55.

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Answer:

x=2 or x=-4. You can also write it as x=2,-4

Step-by-step explanation:

Write your equation and start by subtracting 9 from both sides

10x^2+20x-71-9=9-9

You should end up with

10x^2+20x-80=0

For this equation: a=10, b=20, c=-80

Now we use the quadratic formula and substitute the information. I have attached a picture for you.

True. If v is an eigenvector of A with eigenvalue λ, then for any scalar c ≠ 0, we have Av = λv, and multiplying both sides by c gives Acv = cAv = cλv. Therefore, cv is also an eigenvector of A with eigenvalue cλ.

Let A be an n x n matrix and let v be a non-zero n-dimensional column vector. We say that v is an eigenvector of A if there exists a scalar λ such that Av = λv. The scalar λ is called the eigenvalue corresponding to the eigenvector v.

Now, suppose that v is an eigenvector of A with eigenvalue λ. If we multiply both sides of the equation Av = λv by a non-zero scalar c, we get:

Acv = cAv = cλv

Therefore, if we let w = cv, we have:

Aw = A(cv) = (Ac)v = (cλ)v = λ(cv) = λw

This shows that w = cv is also an eigenvector of A, with eigenvalue λ, as required. So, if v is an eigenvector of A, then any non-zero scalar multiple of v is also an eigenvector of A with the same eigenvalue.

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