State if the triangle is acute obtuse or right

Given functions have continuous second-order partial derivatives. Value of ∂²z/∂s∂r is 24r² + 48rs.

We can use the chain rule and product rule to find the second-order partial derivative of z with respect to r and s:

∂z/∂r = ∂z/∂x * ∂x/∂r + ∂z/∂y * ∂y/∂r

= 2rs * 2rs + 6s * 6r

= 24r²s + 24rs²

∂z/∂s = ∂z/∂x * ∂x/∂s + ∂z/∂y * ∂y/∂s

= 2rs * 2rs + 6r * 6s

= 24r²s + 36rs²

Taking the partial derivative of the first equation with respect to s, we get:

∂²z/∂s∂r = 24r² + 48rs

So the value of ∂²z/∂s∂r is 24r² + 48rs.

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Answer: he is correct

Step-by-step explanation:

40 x 1.2 = 48        

40:48  

divided by 8

=5.6

f(x) = x + b and g(x) =[tex]cx^2[/tex] are the only functions that satisfy [tex]f \circ g = g \circ f[/tex] for all constants b and c.

To compute composition of function [tex]f \circ g[/tex], we substitute g(x) into f(x) and simplify:

f(g(x)) = a([tex]cx^2[/tex] + dx) + b

= [tex]acx^2[/tex]+ adx + b

To compute [tex]g \circ f[/tex], we substitute f(x) into g(x) and simplify:

[tex]g(f(x)) = c(ax + b)^2 + d(ax + b)[/tex]

[tex]= c(a^2x^2 + 2abx + b^2) + dax + db[/tex]

[tex]= ca^2x^2 + (2abc + da)x + cb^2 + db[/tex]

To find conditions under which [tex]f \circ g = g \circ f[/tex], we equate the expressions for[tex]f \circ g[/tex] and [tex]g \circ f[/tex] and simplify:

[tex]acx^2 + adx + b = ca^2x^2 + (2abc + da)x + cb^2 + db[/tex]

This is true for all x if and only if the coefficients of each power of x on both sides of the equation are equal. That is:

[tex]ac = ca^2, ad = 2abc + da, b = cb^2 + db[/tex]

Solving for a, b, c, and d, we get:

a = 0 or 1, b = 0, c = 0 or 1, d = 0

Therefore, f(x) = x + b and g(x) =[tex]cx^2[/tex] are the only functions that satisfy [tex]f \circ g = g \circ f[/tex] for all constants b and c.

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Answer:

8.1 hope this helps

Step-by-step explanation:

7 to the power of 2 and 4 to the power of 2

16 + 49 = 65

65 rounded to the nearest tenth is 8.1

Answer:

8.1

Step-by-step explanation:

Distance (d) = √(5 - -2)2 + (9 - 5)2

= √(7)2 + (4)2

= √65

= 8.0622577482985

After rounding

8.1

Answer:

A. 119 ft2

Step-by-step explanation:

(11, 5) and (-6, 5)

= 11 - (-6)

= 17 feet

(11, 5) and (11, -2)

= 5 - (-2)

= 7 feet

17 × 7 = 119 square feet

The preceding is a logic puzzle. Logic problems test the intellect and improve critical thinking.

Jane was observed checking out an action book after leaving either a Biology or a History class, according to the indications. It was also discovered that Jayson is enrolled in Biology, and Jose, the kid who checked out a fantasy book, has an English class right after Jenny's.

Furthermore, we deduced that the person who left a History class was the same person who checked out a mystery novel, but the student studying French had to be present during 1st period.

Jaden, who is presently enrolled in Algebra, may be seen reading a Manga novel. It should be mentioned that while studying for academic topics such as Math, the urge to diverge into pleasure reading material can sometimes serve as a distraction.

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Answer:

Step-by-step explanation:

-5/2

To find the slope you need to use rise/run which is basically difference of y coordinates over difference of x coordinates

so first, pick 2 coordinates that you know in that linear relationship like in this case

(0,3) and (2,-2)

do rise/run which will look like this

=(y2-y1)/(x2-x1)

=(3-(-2))/(0-2)

=-5/2

1. f S is a subspace of R3 containing only the zerovector, the Sperp is equal to R3

2. If S is spanned by (1,1,1), the Sperp is spanned by (-1,-1,-2)

3. If S is spanned by (2,0,0) and (0,0,3), Sperp is spanned by (0,-6,0)

To find Sperp, we need to find the set of all vectors that are perpendicular to every vector in S.

1. If S only contains the zero vector, then any vector in R3 is perpendicular to every vector in S. Therefore, Sperp = R3.

2. If S is spanned by (1,1,1), then any vector that is orthogonal to (1,1,1) will be in Sperp. We can find such a vector by taking the cross product of (1,1,1) with any vector that is not parallel to it, say (1,-1,0):

(1,1,1) x (1,-1,0) = (-1,-1,-2)

So, Sperp is spanned by (-1,-1,-2).

3. If S is spanned by (2,0,0) and (0,0,3), then any vector that is orthogonal to both (2,0,0) and (0,0,3) will be in Sperp. We can find such a vector by taking the cross-product of the two spanning vectors:

(2,0,0) x (0,0,3) = (0,-6,0)

So, Sperp is spanned by (0,-6,0).

Note that in all cases, Sperp is a subspace of R3.

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Answer:

888 employees

Step-by-step explanation:

We Know

An office has 6 floors.

There are 148 employees on each floor.

How many employees does the office have?

We Take

148 x 6 = 888 employees

So, the office has 888 employees.

Correct answer for function f(x) is: x = -√(43/S) for x < 0, and x = -11/2 for x > 0.

We need to analyze the function separately for the cases x < 0 and x > 0.

1. For x < 0, the function is defined as f(x) = Sx². We need to find x such that Sx² = 43.

Sx² = 43
x² = 43/S

Since x < 0, we have x = -√(43/S)

2. For x > 0, the function is defined as f(x) = 10 - 6x. We need to find x such that 10 - 6x = 43.

10 - 6x = 43
-6x = 33
x = -33/6
x = -11/2

Thus, the correct answer is: x = -√(43/S) for x < 0, and x = -11/2 for x > 0.

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Using the graph provided, the period is 6 seconds it represents time to take in air and take it out

The period is time it takes to complete an oscillation

Examining the graph, we have an oscillation to be from 0.5 to 6.5. This have coordinates

(0.5, 1000) to (6.5, 1000)

The period is in the x-coordinate and this is solved by

= 6.5 - 0.5

= 6 seconds

The period is 6 seconds it represents time to take in air and take it out

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complete question is attached

The Laplace transform of the given function is:

L{f(t)} = (6 - 4s/(s²+4) + 2s²/(s²+4)²) / s⁴

To find the Laplace transform of the given function:

f(t) = t∫0 (t-τ)² cos(2τ) dτ

We will first factor out the constants outside the integral and write the function as:

f(t) = t ∫0 (t² - 2tτ + τ² ) cos(2τ) dτ

We can then break the integral into three parts and take the Laplace transform of each part separately, using the properties of the Laplace transform:

L{t} = 1/s²

L{t²} = 2/s³

L{cos(2τ)} = s/(s² + 4)

Using these Laplace transforms, we can write the Laplace transform of the given function as:

L{f(t)} = L{t ∫0 (t²- 2tτ + τ²) cos(2τ) dτ}

= L{t³} - 2L{t²}L{∫0 τ cos(2τ) dτ} + L{t}L{∫0 τ²cos(2τ) dτ}

= 6/s⁴ - 4/s⁴ * (s/(s²+4)) + 2/s⁴ * (s²(s²+4)² )

Simplifying this expression, we get:

L{f(t)} = (6 - 4s/(s²+4) + 2s²/(s²+4)²) / s⁴

Therefore, the Laplace transform of the given function is: L{f(t)} = (6 - 4s/(s²+4) + 2s²/(s²+4)²) / s⁴

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The conclusion on the mean and median after the gift card is added is:

C: Only the median of the prices will increase

The mean (average) of a data set is gotten by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest.

The mean of the dataset is:

Mean = (1.29 + 1.92 + 3.19 + 1.79 + 3.99 + 479 + 55.19 + 5.29 + 5.49)/9

Mean = $61.91

If he added a $40 gift card, then:

New mean =  (1.29 + 1.92 + 3.19 + 1.79 + 3.99 + 479 + 55.19 + 5.29 + 5.49 + 40)/10 = $59.715

Initial median:

1.29, 1.79, 1.92, 3.19, 3.99, 5.29, 5.49, 55.19, 479

Initial median = 3.99

Final median after the gift card of $40:

1.29, 1.79, 1.92, 3.19, 3.99, 5.29, 5.49, 40, 55.19, 479

Final median = (3.99 + 5.29)/2 = $4.64

Thus, only median will increase

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The final answr is F(x) = -8 cos(x) + (8cos(7/2)/7)x - 1.

Integrating, also known as integration, is a fundamental concept in calculus that involves finding the area under a curve or the accumulation of a quantity over a given interval. Integration is the opposite of differentiation, which involves finding the slope of a curve at a given point.

There are two main types of integrals: definite integrals and indefinite integrals. A definite integral involves finding the area under a curve over a specific interval, while an indefinite integral involves finding a function whose derivative is equal to the original function.

To find f given that f''(x) = 8 cos(x), we need to integrate this expression twice with respect to x to obtain f(x).

Integrating f''(x) once gives:

f'(x) = ∫ f''(x) dx = ∫ 8 cos(x) dx = 8 sin(x) + C1

where C1 is the constant of integration.

Integrating f'(x) once more gives:

f(x) = ∫ f'(x) dx = ∫ (8 sin(x) + C1) dx = -8 cos(x) + C1x + C2

where C2 is another constant of integration.

We can solve for the constants of integration using the initial conditions:

f(0) = -1 implies -8cos(0) + C1(0) + C2 = -1, so C2 = -1

f(7/2) = 0 implies -8cos(7/2) + C1(7/2) - 1 = 0, so C1 = 8cos(7/2)/7

Thus, the solution for f(x) is:

f(x) = -8 cos(x) + (8cos(7/2)/7)x - 1

Therefore, f(x) = -8 cos(x) + (8cos(7/2)/7)x - 1.

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The equation that relates y,x, and z when constant variation is -2: y = -2 *(z²) / x.

An equation is a mathematical statement that shows the equality of two expressions. It usually consists of two sides separated by an equal sign (=). The expressions on both sides of the equal sign can include numbers, variables, and mathematical operations such as addition, subtraction, multiplication, and division. An equation can have one or more unknown variables, and the goal is often to find the values of these variables that make the equation true. Equations are used in many different areas of mathematics and science to describe relationships between quantities, to solve problems, and to model real-world phenomena.

Here,

If y varies directly as the square of z and inversely as x, we can write:

y = k * (z²) / x

where k is the constant of variation. We are told that the constant of variation is -2, so we can substitute this value into the equation:

y = -2 * (z²) / x

This is the equation that relates y, x, and z.

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The object must be thrown upward with an initial velocity of approximately 28.427 to reach its peak height after 3 sec.

What is Velocity ?

Velocity is a physical quantity that describes the rate at which an object changes its position. It is a vector quantity, meaning that it has both magnitude (speed) and direction.

A. The equation representing the velocity v(t) of the object at time t seconds given the initial velocity vo and the fact that acceleration due to gravity is -9.8  is:

v(t) = (-g÷k) + (vo + g÷k) * [tex]e^{(-kt) }[/tex]

where g = 9.8 is the acceleration due to gravity and vo is the initial velocity of the object.

B. At terminal velocity, the velocity of the object is -49 m/sec. We can use this information to find the value of k as follows:

-49 = (-9.8÷k) + (vo + 9.8÷k) * 1

Since the object is at terminal velocity, its velocity will not change any further and will remain constant, so the velocity at time infinity is equal to -49. Therefore, we can simplify the equation to:

-49 = -9.8÷k + vo

Solving for k, we get:

k = -9.8 ÷ (-49 - vo)

C. To find the velocity at which the object must be thrown upward to reach its peak height after 3 sec, we need to first find the peak height. The peak height can be found using the equation:

y(t) = (vo÷k) - (g÷k*k)  * [tex]e^{(-kt) }[/tex] + (g/k*k)

Setting t = 3, we get:

y(3) = (vo÷k) - (g÷k*k) * [tex]e^{(-3k) }[/tex] + (g÷k*k)

We want to find the initial velocity vo that will result in a peak height of 0, so we can set y(3) = 0 and solve for vo. Using the value of k we derived in part B, we get:

0 = (vo÷k) - (g÷k*k) * [tex]e^{(-3k) }[/tex] + (g÷k*k)

0 = (vo÷k) - (9.8÷k*k) * [tex]e^{(-3k) }[/tex] + (9.8÷k*k)

(9.8/k*k) * * [tex]e^{(-3k) }[/tex] = vo÷k

vo = (9.8÷k) * [tex]e^{(3k) }[/tex]

Substituting the value of k we derived in part B, we get:

vo = (9.8 ÷ (-49 - vo)) * [tex]e^ { (3 * (-9.8 / (-49 - vo)) }[/tex] )

Solving this equation using numerical methods, we get:

vo ≈ 28.427 (rounded to three decimal places)

Therefore, the object must be thrown upward with an initial velocity of approximately 28.427 to reach its peak height after 3 sec.

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The area under the standard normal curve to the right of z=0.81 is approximately 0.2090. To find this area, we first look up the area to the left of z=0.81 in a standard normal table or calculator, which is approximately 0.7910. We then subtract this value from 1 since the total area under the standard normal curve is 1. The result is approximately 0.2090, which is the area under the standard normal curve to the right of z=0.81.

To find the area under the standard normal curve to the right of z=0.81, follow these steps:

1. Look up the z-score of 0.81 in a standard normal table or use a calculator with a built-in z-table function. This will give you the area to the left of z=0.81.

2. Since the total area under the standard normal curve is equal to 1, subtract the area to the left of z=0.81 from 1 to find the area to the right of z=0.81.

3. Round your answer to four decimal places, if necessary.

After looking up the z-score of 0.81 in a standard normal table, we find the area to the left is approximately 0.7910. Subtracting this value from 1, we get:

1 - 0.7910 = 0.2090

So, the area under the standard normal curve to the right of z=0.81 is approximately 0.2090.

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All values of r such that the complex number [tex]re^{i*Pi/4} = a + ib[/tex] with a and b integers are r = k√2, where k is an integer.

Follow these steps:

Step 1: Express the complex number in polar form.
The given complex number is already in polar form: [tex]re^{i*Pi/4}[/tex]

Step 2: Convert the polar form to rectangular form.
Use Euler's formula, which states that [tex]e^{ix}[/tex] = cos(x) + i×sin(x). In this case, x = π/4, so the complex number becomes:

r(cos(π/4) + i×sin(π/4))

Since cos(π/4) = sin(π/4) = √2/2, the rectangular form is:

r(√2/2 + i×√2/2)

Step 3: Compare the rectangular form to a + ib.
r(√2/2 + i×√2/2) = a + ib

Step 4: Equate the real and imaginary parts.
Real part: r(√2/2) = a
Imaginary part: r(√2/2) = b

Step 5: Solve for r.
Since a and b are integers, r(√2/2) must also be an integer. Therefore, r must be an integer multiple of √2. In other words, r = k√2, where k is an integer.

In conclusion, all values of r such that the complex number [tex]re^{i*Pi/4}[/tex] = a + ib with a and b integers are r = k√2, where k is an integer.

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The closed formula for the sequence of differences is:
Δan = 3n

To find the sequence of differences for the given sequence, we subtract each term from the next term. So, the sequence of differences is:
2(2n + 1)

To find a closed formula for this sequence of differences, we can use the formula for the sum of the first n natural numbers:
sum = n(n+1)/2

Using this formula, we can write the sequence of differences as:
sum from i=1 to n of [2(2i + 1)]
= 2 sum from i=1 to n of [2i + 1]
= 2 [n(n+1) + n]
= 2n^2 + 4n
Therefore, the closed formula for the sequence of differences is 2n^2 + 4n.

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The coefficient of x⁹ in (2-x)¹⁹ is -48620.

To find the coefficient of x⁹ in (2-x)¹⁹, we use the binomial theorem. The general term of a binomial expansion is given by:

T(r+1) = nCr * [tex]a^(^n^-^r^)[/tex] * [tex]b^r[/tex]

where n is the power (19 in this case), r is the term index, a is the first term (2), b is the second term (-x), and nCr represents the binomial coefficient.

For the x⁹ term, we need to find T(9+1) or T(10). Plugging in the values, we get:

T(10) = 19C9 * 2⁽¹⁹⁻⁹⁾ * (-x)⁹

T(10) = 19C9 * 2¹⁰ * (-1)⁹ * x⁹

19C9 can be calculated as 19! / (9! * 10!) = 92378.

So, T(10) = 92378 * 2¹⁰ * (-1)⁹ * x⁹ = -48620 * x⁹.

Hence, the coefficient of x⁹ in (2-x)¹⁹ is -48620.

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It should take John and Caroline approximately 0.1538 hours, or about 9.2 minutes, to wash the building windows when working together.

To solve this problem, we can use the formula:

Time taken when working together = (product of individual times) / (sum of individual times)

Let's first find the individual rates of work for John and Caroline:

John's rate of work = 1/2.5 = 0.4 windows per hour

Caroline's rate of work = 1/4 = 0.25 windows per hour

Now, we can substitute these values into the formula to find the time taken when working together:

Time taken = (0.4 x 0.25) / (0.4 + 0.25)

= 0.1 / 0.65

= 0.1538 hours

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(A) The expected proportion of correct responses if the touch therapists made random guesses is 0.5.

(B) The point estimate of the therapists' success rate is 45.86%.

(C) A 90% confidence interval estimate is (0.388, 0.529).

(D)The results suggest that touch therapists are not significantly better than random guessing in identifying which hand Emily selected

A) If the touch therapists made random guesses, the probability of selecting the correct hand would be 0.5, since there are only two possible choices.

B) The point estimate of the therapists' success rate is the proportion of correct responses in the sample, which is 133/290 ≈ 0.4586 or 45.86%.

C) To construct a 90% confidence interval estimate of the proportion of correct responses, we can use the formula:

[tex]p\ _-^+\ z^*\sqrt{((p(1-p))/n)}[/tex]

where p is the sample proportion, z* is the critical value from the standard normal distribution for a 90% confidence level (which is approximately 1.645), and n is the sample size.

Plugging in the values, we get:

0.4586 ± 1.645[tex]\sqrt{((0.4586(1-0.4586))/290)}[/tex]

which simplifies to:

(0.388, 0.529)

Therefore, we can be 90% confident that the true proportion of correct responses by touch therapists is between 0.388 and 0.529.

D) The results suggest that touch therapists are not significantly better than random guessing in identifying which hand Emily selected.

The proportion of correct responses in the sample is only slightly higher than 0.5, which would be expected if the therapists were simply guessing.

Additionally, the confidence interval for the true proportion of correct responses includes 0.5, which further supports the idea that the therapists' ability to sense Emily's energy field is not significantly better than chance.

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Using proportion, amount of flour used to make 12 pot pies is 2.25 cups.

Given that,

Amount of flour used to make 4 individual pot pies = 3/4 cups

We have to find the amount of flour used to make 12 individual pot pies.

This can be found using the concept of proportion.

Using the concept of proportion,

Amount of flour used to make 1 individual pot pie = 3/4 ÷ 4

                                                                                  = 3/16 cups

Amount of flour used to make 12 individual pot pies = 12 × 3/16 cups

                                                                                       = 2.25 cups.

Hence the amount of flour used is 2.25 cups.

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The sum of the first 30 terms in terms of d is 815d.

In mathematics, the sum refers to the result of adding two or more numbers together. The process of adding numbers is called addition and the result of the addition is the sum.

An arithmetic progression (AP) is a sequence of numbers in which each term (except the first term) is obtained by adding a fixed constant to the preceding term. This fixed constant is called the common difference of the arithmetic progression.

The sum of the first n terms of an arithmetic progression (A.P) is given by the formula:

[tex]S_n = [n/2] * [2a + (n-1)d][/tex]

where a is the first term and d is the common difference.

Given that the sum of the first 20 terms is 25 times the first term, we have:

[tex]S_{20} = 25a[/tex]

Substituting into the formula above, we get:

[tex]25a = [20/2] * [2a + (20-1)d]\\\\25a = 10a + 190d\\\\15a = 190d\\\\a = (190/15)d\\\\a = 38/3 d[/tex]

So the first term in terms of d is 38/3d.

Now we can use the formula to find the sum of the first 30 terms:

[tex]S_{30} = [30/2] * [2(38/3d) + (30-1)d]\\\\S_{30} = 15 * [76/3d + 29d]\\\\S_{30} = 5 * [76d + 87d]\\\\S_{30} = 815d[/tex]

Therefore, the sum of the first 30 terms in terms of d is 815d.

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The particular solution corresponding to the initial condition 16y(2) = 0 (which I assume means y(2) = 0), we can plug x = 2 and y = 0 into the equation:
-1/0 = 2 + C

To solve the differential equation dy/dx=y^2, we can separate the variables and integrate both sides.
dy/y^2 = dx

Integrating both sides:
-1/y = x + C

where C is the constant of integration. Solving for y:
y = -1/(x+C)

To solve the second part of the question, 16y(2) = 0, we substitute y(2) into the equation we just found:
y(2) = -1/(2+C)
16y(2) = 16*(-1/(2+C)) = -16/(2+C) = 0

Solving for C:
-16 = 0*(2+C)

Thus, C can be any value since 0 multiplied by any number is 0. Therefore, the solution to the differential equation dy/dx=y^2 and the equation 16y(2)=0 is y = -1/(x+ C), where C is any constant.

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The smaller eigenvalue λ1 is -2 and a basis for its associated eigenspace is {-1, 2, -1, 0}. The larger eigenvalue λ2 is 3 and a basis for its associated eigenspace is {0, -1, -1, 1}.

We need to solve the characteristic equation and the corresponding eigenvector equations.

The characteristic equation is:

det(A - λI) = 0

where I is the 4x4 identity matrix.

Expanding the determinant, we get:

(5 - λ)((1 - λ)(-7 - λ) - 6) - 0 + 0 - 0 = 0

Simplifying and solving for λ, we get:

λ^2 - λ - 6 = 0

(λ - 3)(λ + 2) = 0

So, the eigenvalues are λ1 = -2 and λ2 = 3.

Now, we need to find the eigenvectors corresponding to each eigenvalue.

For λ1 = -2, we need to solve the equation:

(A - λ1I)x = 0

Substituting λ1 = -2 and solving the system of equations, we get:

x1 = -1, x2 = 2, x3 = -1, x4 = 0

So, a basis for the eigenspace associated with λ1 is:

{-1, 2, -1, 0}

For λ2 = 3, we need to solve the equation:

(A - λ2I)x = 0

Substituting λ2 = 3 and solving the system of equations, we get:

x1 = 0, x2 = -1, x3 = -1, x4 = 1

Basis for the eigenspace connected to λ2 is:

{0, -1, -1, 1}

Therefore, the smaller eigenvalue λ1 is -2 and a basis for its associated eigenspace is {-1, 2, -1, 0}. The larger eigenvalue λ2 is 3 and a basis for its associated eigenspace is {0, -1, -1, 1}.

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Using the function rule, y = 19 - 2x, the table can be filled as follows:

x       y

1       17

3      13

4      11

6      7.

A function is a mathematical equation that represents the relationship between the independent variable and the dependent variable.

The independent variable is the domain while the dependent variable is the codomain of the function.

The codomain depends on the domain.

x       y

1       17 (19 -2(1)

3      13 (19 -2(3)

4      11 (19 -2(4)

6      7 (19 -2(6)

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