How do I solve this?

Answer: False

Step-by-step explanation:

Researchers typically report the adjusted R-squared value in addition to the regular R-squared value, not because they lack confidence in the actual R-squared, but because the adjusted R-squared provides additional information about the goodness of fit of a statistical model. The regular R-squared value measures the proportion of the variance in the dependent variable that is explained by the independent variables in the model. However, it can be biased and increase as more predictors are added to the model, even if the additional predictors do not contribute significantly to the prediction.

The adjusted R-squared, on the other hand, takes into account the number of predictors in the model and penalizes the addition of irrelevant predictors. It provides a more conservative measure of the goodness of fit by adjusting for the number of predictors and the sample size. Researchers often use the adjusted R-squared to evaluate and compare different models with varying numbers of predictors or to assess the overall explanatory power of a model while considering its complexity.

In summary, researchers report the adjusted R-squared value to address the limitations of the regular R-squared and to provide a more accurate assessment of the model's goodness of fit.

Answer:

answer

Step-by-step explanation:

one of you answer this question

Answer:

15 2/3

Step-by-step explanation:

1 x 2/3 + 15=2/3+15=15 2/3

Answer: 15 2/3

Step-by-step explanation:

1. Times the 1 and the two-thirds.

1 * 2/3 = 2/3

2. Add two-thirds and fifteen.

2/3 + 15 = 15 2/3

Answer:

52.6 mm

Step-by-step explanation:

split this figure and form one square and semi circle

for semicircle

radius = 4mm

find diameter

radius = diameter /2

4*2 = diameter

8 mm = diameter

now find perimeter of square

POS = 4l

=4*8

=32 mm

perimeter of semicircle= πr + 2r

=3.14^4 + 2*4

=12.56 + 8

=20.56 mm

area of the figure = perimeter of square + perimeter of semicircle

=32 + 20.56 mm

=52.56 mm

=52.6 mm

split ur figure as shown below

Answer:

28.6 (by the assumption that 4 is the radius)

Step-by-step explanation:

4 is the radius.

Circumference of a circle is  πd or  2πr

But its a semi circle so our equation will be  2πr/2 + d

So subsitute, 2* π*4/2 + 8

=8 π/2 + 8

=4 π + 8

=20.6

This is only the circumference of the semi-circle

Now for the square, perimeter is equal to 4*S

so from the equation above we know that the diameter is 8(d=2r). The diameter is also one side of the square. Since squares have all sides equal, 4*8= 32

Now add

32+20.6

52.6

Round

52.6

All this is on the assumption that 4 is the radius.

We want to find the value of k given that the area of the region R is 36. To do this, we need to find the limits of integration and set up the integral for finding the area of the region R. The answer is (B) 3.

Since R is in the fourth quadrant and is enclosed by the x-axis and the curve Y = X^2 - 2KX, we can find the limits of integration by setting Y = 0 and solving for X:

0 = X^2 - 2KX
X(X - 2K) = 0
X = 0 or X = 2K

So the limits of integration are from X = 0 to X = 2K.

Now we can set up the integral for finding the area of the region R:

∫[0,2K] (X^2 - 2KX) dX

Integrating this expression gives:

[(1/3)X^3 - KX^2] evaluated at 0 and 2K

Plugging in the limits of integration and simplifying, we get:

(8/3)K^3 - 4K^3

Simplifying this expression, we get:

(2/3)K^3 = 36

Solving for K, we get:

K^3 = 54

Taking the cube root of both sides, we get:

K = 3

Therefore, the answer is (B) 3.

To find the value of k, follow these steps:

1. Determine the x-intercepts of the curve Y = X^2 - 2KX by setting Y = 0.
0 = X^2 - 2KX
X(X - 2K) = 0
The x-intercepts are X = 0 and X = 2K.

2. As we are looking for the area in the fourth quadrant, the integral bounds are from 0 to 2K.

3. Set up the integral for the area:
Area = ∫(X^2 - 2KX) dx, from 0 to 2K

4. Evaluate the integral:
Area = (X^3/3 - KX^2) | from 0 to 2K
= [(8K^3/3 - 4K^3) - (0)]
= 8K^3/3 - 4K^3
= (4K^3/3)

5. Set the area equal to 36 and solve for k:
36 = (4K^3/3)
9 = K^3
k = 3^(1/3) ≈ 2.08

The closest value from the given options is (A) 2.

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The ratios that could be the lengths of the two legs in a 30-60-90 triangle are √3:3 (option E) and 12√3 (option D).

In a 30-60-90 triangle, the angles are in the ratio of 1:2:3. The sides of this triangle are in a specific ratio that is consistent for all triangles with these angles. Let's analyze the given options to determine which ones could be the ratio between the lengths of the two legs.

A. √2:√2

The ratio √2:√2 simplifies to 1:1, which is not the correct ratio for a 30-60-90 triangle. Therefore, option A is not applicable.

B. 15

This is a specific value and not a ratio. Therefore, option B is not applicable.

C. √√√√5

The expression √√√√5 is not a well-defined mathematical operation. Therefore, option C is not applicable.

D. 12√3

This is the correct ratio for a 30-60-90 triangle. The ratio of the longer leg to the shorter leg is √3:1, which simplifies to √3:3. Therefore, option D is applicable.

E. √3:3

This is the correct ratio for a 30-60-90 triangle. The ratio of the longer leg to the shorter leg is √3:1, which is equivalent to √3:3. Therefore, option E is applicable.

F. √2:√5

This ratio does not match the ratio of the sides in a 30-60-90 triangle. Therefore, option F is not applicable. So, the correct option is D. 1 √2.

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The 99% confidence interval for the mean difference between the before and after scores is (-0.5 ,4.5).

A writing-test is taken for sample of students which are randomly selected,   before and after they completed formal writing-course.

The results of the test scores before and after the test are :

Before ⇒ 80, 70,  92,  99,  97,  93,  76,  63,  68,  71,   74

After    ⇒ 79,  69,  90,  96, 95,  91,   75,  64,  62,  64,  76

So,

Diff(d) ⇒   1,      1,     2,     3,   2,   2,     1,    -1,     4,     7,    -2,

⇒ d²   ⇒   1,      1,     4,     9,   4,   4,     1,     1,     16,   49,   4,

Sum of difference = Σd = 22, and

Sum of d² = 114;

Mean difference is = 2,

The degree of freedom (df) = 11 - 1 = 10,

So, the standard deviation (S.D.) =√(Σd²-(Σd)²/n)/(n-1) = 2.645751 , and

the standard error (Se) = (S.D.)/√n = 2.6457/√11 = 0.7977,

For 99% confidence interval , 10 degree of freedom , t-value is = 3.169,

We know that, confidence interval = {(sample mean) ± t × standard error};

So, Margin of error = t × standard error = 2.527987 ≈ 2.5,

The lower confidence limit is = 2 - 2.5 = -0.5,

The upper confidence limit is = 2 + 2.5 = 4.5,

Therefore, the required 90% confidence interval is (-0.5 ,4.5).

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The given question is incomplete, the complete question is

A test of writing ability is given to a random sample of students before and after they completed a formal writing course. The results are given below. Construct a 99% confidence interval for the mean difference between the before and after scores. Round the limits to the nearest tenth.

Before 70   80   92   99   93   97    76   63   68   71   74

After    69   79   90   96   91    95   75   64   62   64   76

Answer:

1. acute angle (less than <90)

2. right angle (approximately <90)

3. obtuse angle (more than <90)

4. acute angle (less than <90)

Answer:

Step-by-step explanation:

To solve the given equation \(\sf x - y = 4 \\\), we can perform the following calculations:

a) To find the value of \(\sf 3(x - y) \\\):

\(\sf 3(x - y) = 3 \cdot 4 = 12 \\\)

b) To find the value of \(\sf 6x - 6y \\\):

\(\sf 6x - 6y = 6(x - y) = 6 \cdot 4 = 24 \\\)

c) To find the value of \(\sf y - x \\\):

\(\sf y - x = - (x - y) = -4 \\\)

Therefore:

a) The value of \(\sf 3(x - y) \\\) is 12.

b) The value of \(\sf 6x - 6y \\\) is 24.

c) The value of \(\sf y - x \\\) is -4.

\(\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}\)

♥️ \(\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}\)

Answer:

Division

Step-by-step explanation:

here's your process

=>. it is your equation 17b = 54

=> now divide 17 on both side

=> then we get 17b/17 = 54/17

=> hence , we get b = 54/17

=>now b is isolated by the method of division

hope it helps

Answer:

A

Step-by-step explanation:

You would divide it by pie r squared to get h then flip the equation around so it would be

h= v/ pie r squared

Answer:

Explanation

V = π r^2 H

V = π × r × r × H

V/ π r^2 = H

H = V/π r^2

Answer:

3/10          Smallest

2/5                  I

1/4                   I

1/3                  V

5/6            Largest

Hope this helps :)

Neglect a is constructive response to job satisfaction is the false statement.

Neglect is not a constructive response to job satisfaction. It refers to a situation where employees feel ignored, unappreciated, or unsupported in their work, which can negatively impact their job satisfaction. Constructive responses to job satisfaction involve addressing concerns, providing support, and promoting a positive work environment.

Job satisfaction refers to an individual's level of contentment and fulfillment with their job. It is influenced by various factors such as work environment, compensation, relationships with colleagues, opportunities for growth, and alignment with personal values.

When employees experience job dissatisfaction, they may respond in different ways. One possible response is neglect, which refers to a passive and disengaged attitude towards work. Neglectful employees may become indifferent, withdraw their effort, or mentally check out from their responsibilities.

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As per the concept of unitary method, the another way to express 8 feet is 2 ²/₃ yards.

In math, unitary method is known as a way of finding out the solution of a problem by initially finding out the value of a single unit, and then finding out the essential value by multiplying the single unit value.

Here we have given that a clothesline rope is 8 feet long.

Now we need to find another way to express 8 feet.

We know that the formula to convert the measurement it to divide the length by the conversion ratio.

As we know that one yard is equal to 3 feet, then we can use this simple formula to convert is written as

=> yards = feet ÷ 3

Here the equivalent yard measurement is written as,

=> yards = 8 ÷ 3

Then we have to convert the improper fraction into mixed fraction form, then we get,

=> 2 ²/₃ yards.

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The correct graph that models this exponential decay would show a decreasing trend as x (the number of years) increases. we need to consider the information given regarding its decrease in value.

The piece of machinery decreases in value by 22.5% each year. This means that its value after one year is \(100\% - 22.5\% = 77.5\%\) of its original value. In other words, its value is 0.775 times its original value.

To model the value of the machinery after x years, we need to consider the exponential decay function. The general form of an exponential decay function is:

y = \(a(1 - r)^x\)

Where:

- y represents the value after x years.

- a represents the initial value.

- r represents the decay rate (expressed as a decimal).

In this case, the initial value (a) is $150,000 and the decay rate (r) is 22.5% or 0.225.

Therefore, the equation representing the value of the piece of machinery after x years would be:

y = \(\$150,000 * (1 - 0.225)^x\)

Simplifying the equation further, we have:

y = \(\$150,000 * (0.775)^x\)

From this equation, we can see that the value of the machinery decreases exponentially over time. The correct graph that models this exponential decay would show a decreasing trend as x (the number of years) increases.

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The Maclaurin series expansion of f(x) = 1/(1-x)² is

1 + 2x + 6x² + 24x³ +......

The general expression for the Maclaurin series is given by the formula:

f(x) = f(0) + xf'(0) + x²f''(0) + ..... + xⁿf⁽ⁿ⁾(0)+...

= ∑ f⁽ⁿ⁾ (0)xⁿ/n!

n= 0 to infinity

Specifying the convergence region completes the Maclaurin series formulation. Detailed five steps for determining the Maclaurin series of

f(x) = 1/(1-x)²

Step 1 : Find Derivatives for f(x)

f(x) = 1/(1-x)²

f'(x) = -2(1-x)⁽⁻²⁻¹⁾ (-1) = 2/(1-x)³

The second derivative of f(x) is the derivative of f''(x) :

f"(x) = 2(-3)(1-x)⁽⁻³⁻¹⁾(-1) = 6/(1-x)⁴

Differentiating again, f"'(x) = 6(-4)(1-x)⁽⁻⁴⁻¹⁾(-1)

= 24/(1-x)⁵

Thus, the nᵗʰ derivative is ,

f⁽ⁿ⁾(x) = (n+1)!/(1-x)⁽ⁿ⁻¹⁾

Step 2: Evaluate These Derivatives and f(x) at x=0 let x = 0 , f(0) = 1

f'(0) = 2 , f"(0) = 6 , ....... , f⁽ⁿ⁾(0) = (n+1)!

Step 3 : Now, the Sum of Products :

f(x) = f(0) + xf'(0) + x²f''(0) + ..... + xⁿf⁽ⁿ⁾(0)+...

xf'(0) = 2x

x²f"(0) = 6x²

x³f"'(0) = 24 x³

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

xⁿf⁽ⁿ⁾(0)= (n+1)!

Thus, the Maclaurin series for ln(1 + x) is this:

f(x) = (1−x)⁻² = 1 + 2x + 6x² + 24x³ +......

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Answer:

$8.60

Step-by-step explanation:

Let x = the tip

80 - x = 9(5.85 + 1.25) + 5(1.50)

80 -x = 63.90 + 7.5

80 - x = 71.40  Subtract 80 from both sides

-x = -8.60  Divide both sides by -1

x = 8.60

The correct answer is option B, which shows a line going from the point (0, 60) to the point (3, 120).

How to find amount?

Let's start by finding out how much money the painter earns for each room painted. The painter pays $60 for supplies, so this amount must be subtracted from the total amount earned. Then, the painter charges $20 for each room painted, so the amount earned for each room painted is $20. Therefore, the total amount earned for painting $n$ rooms can be represented by the equation:

Total amount earned = $20n - $60

Now, we can use this equation to plot the relationship between the amount of money the painter earns and the number of rooms painted. To do this, we can create a coordinate grid with the x-axis labeled "Rooms Painted" and the y-axis labeled "Amount of Money Earned".

Option A shows a line going from the point (0, 60) to the point (3, 0). This line does not accurately represent the relationship between the number of rooms painted and the amount of money earned. The line seems to indicate that the painter earns no money for painting 3 rooms, which is not true.

Option B shows a line going from the point (0, 60) to the point (3, 120). This line accurately represents the relationship between the number of rooms painted and the amount of money earned. The painter earns $60 for supplies and an additional $20 for each room painted, so for 3 rooms painted, the painter earns a total of $120.

Option C shows a line going from the point (0, -60) to the point (3, 0). This line does not accurately represent the relationship between the number of rooms painted and the amount of money earned. The line seems to indicate that the painter starts with a debt of $60, which is not true.

Option D shows a line going from the point (0, -60) to the point (3, -120). This line does not accurately represent the relationship between the number of rooms painted and the amount of money earned. The line seems to indicate that the painter loses money for each room painted, which is not true.

Therefore, the correct answer is option B, which shows a line going from the point (0, 60) to the point (3, 120).

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Answer:

Right angled triangle

Step-by-step explanation:

Right angled triangle has angle of 90degree

Answer:

Step-by-step explanation:

It applies only to a right angled triangle.

Answer:

Either do 28+28+28, etc. 38 times, or follow the diagram I attached.

If you want to know more about what I did in the attachment, just ask <3

Answer:

Start by multiplying the ones: 6 times 28 is 168. Next, multiply the tens: 30 times 28 is 840. Add the products to get 1,008.

Step-by-step explanation:

A random sample is then drawn from each stratum using the stratified sampling approach, which divides the population into subgroups (strata) depending on certain criteria (stratum).

The university's student body serves as the population in this situation, while the eight schools serve as the subgroups (business, liberal arts, engineering, etc.).

The administrator can reach conclusions regarding the cost of textbooks for each institution by selecting a sample of 50 students from each college to make sure the sample is representative of the varied student body.

This approach is helpful when a population is divided into multiple subgroups and the researcher wants to make sure that the sample fairly reflects each segment.

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Answer:

Step-by-step explanation:

Dividing 3 into 2 results in the infinite (repeating) decimal fraction 0.6666....

      0 . 6

3 / 20

     18

     ------------

        20

and so on:  this pattern repeats itself indefinitely

The answer is, the correct statement are , 1. The matrix B² is positive definite if A is positive definite. ,2. A square matrix and its transpose have the same set of eigenvectors. , 3. A real square matrix has only real eigenvalues. , 4. The dimension of the row space of a matrix A with rank 4 is 4. , 5. The dimension of the null space of matrix A is 4.

the correct statements from the options provided:

1. The matrix B² is positive definite if A is positive definite.
2. A square matrix and its transpose have the same set of eigenvectors.
3. A real square matrix has only real eigenvalues.
4. The dimension of the row space of a matrix A with rank 4 is 4.
5. The dimension of the null space of matrix A is 4.

Please note that the statements regarding the values of x, dx, v, r, Av, and trace are incomplete or incorrect, so I have not included them in my answer.

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For Car A, we have that:

a. The function is exponential.

b. The definition of the function is: \(y = 18500(0.94)^x\)

c. When x = 9, the numeric value of the function is given as follows: 10,600.

For Car B, we have that:

a. The function is linear.

b. The definition of the function is: y = -750x + 18500.

c. When x = 9, the numeric value of the function is given as follows: 11,750.

The general format of an exponential function is presented as follows:

y = ab^x.

In which the parameters are defined as follows:

For Car A, the function is exponential, as the rate of change is a constant quotient, as follows:

b = 16346.60/17390 = 15365.80/16345.60 = 0.94.

Hence:

\(y = a(0.94)^x\)

The initial value is calculated as follows:

a = 17390/0.94

a = 18500.

Hence the function is:

\(y = 18500(0.94)^x\)

The numeric value at x = 9 is given as follows:

\(y = 18500(0.94)^9 = 10,600\)

A linear function has the general format given as follows:

y = mx + b.

In which the parameters are explained as follows:

For Car B, the function is linear, as the difference between consecutive terms is the same, as follows:

m = 17000 - 17750 = 16250 - 17000 = -750.

Hence the intercept is:

b = 17750 + 750 = 18500.

Then the function is:

y = -750x + 18500.

The numeric value at x = 9 is given as follows:

y = -750(9) + 18500 = 11,750.

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Answer:

It is not a function

Step-by-step explanation:

It is not a function because the domain -1 repeats itself.

Domain: x axis number

Answer: 4 black marbles, 3 blue, 2 green, and one red.

Step-by-step explanation:

Answer:

1 1/9 miles

Step-by-step explanation:

If john swims 5/12 of a mile in 3/8 of an hour, then;

5/12 miles = 3/8 hours

TO get the number of miles he swims in an hour, we will say;

x miles = 1 hour

Equating both expressions

5/12 miles = 3/8 hours

x miles = 1 hour

Cross multiply

3/8 x = 5/12

3x/8 = 5/12

3x * 12 = 5 * 8

36x = 40

x = 40/36

x = 10/9

x = 1 1/9

The amount he swims in an hour is 1 1/9 miles