Please help and show work please

If we want to provide a 95% confidence interval for the mean of a population, the confidence coefficient will be: D. .95.

A confidence interval is also referred to as level of confidence and it can be defined as a range of estimated values that defines the probability that a population parameter would fall or lie within it.

For instance, the confidence interval at 95% is given by p - E < p < p + E

Since the confidence interval for the mean of a population is at 95%, the confidence coefficient would be calculated by simply dividing the confidence interval by 100:

Confidence coefficient = 95/100

Confidence coefficient = 0.95

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Answer: 70

Step-by-step explanation: 70 X 1.30 =91

Comparing det(A') and det(A), we can see that the only difference is the coefficients of the first row elements. Specifically, the coefficients in det(A') are multiplied by c.

The row operation r₁ → cr₁ - ar₃ changes the determinant of the matrix A by a factor of c.

To show that the row operation r₁ → cr₁ - ar₃ changes the determinant of a matrix A by a factor of c, we can apply the row operation to the matrix A and calculate the determinants before and after the operation.

Let's consider the matrix A as:

A = [a₁₁ a₁₂ a₁₃]

[a₂₁ a₂₂ a₂₃]

[a₃₁ a₃₂ a₃₃]

Performing the row operation r₁ → cr₁ - ar₃, we get the updated matrix A':

A' = [ca₁₁ - a₃₁ ca₁₂ - a₃₂ c*a₁₃ - a₃₃]

[a₂₁ a₂₂ a₂₃ ]

[a₃₁ a₃₂ a₃₃ ]

To find the determinant of A', denoted as det(A'), we can expand it along the first row:

det(A') = (ca₁₁ - a₃₁) * det([a₂₂ a₂₃]

[a₃₂ a₃₃]) - (ca₁₂ - a₃₂) * det([a₂₁ a₂₃]

[a₃₁ a₃₃]) + (c*a₁₃ - a₃₃) * det([a₂₁ a₂₂]

[a₃₁ a₃₂])

Expanding the determinants of the 2x2 matrices, we have:

det(A') = (ca₁₁ - a₃₁) * (a₂₂ * a₃₃ - a₂₃ * a₃₂) - (ca₁₂ - a₃₂) * (a₂₁ * a₃₃ - a₂₃ * a₃₁) + (c*a₁₃ - a₃₃) * (a₂₁ * a₃₂ - a₂₂ * a₃₁)

Now, let's calculate the determinant of A, denoted as det(A):

det(A) = a₁₁ * det([a₂₂ a₂₃]

[a₃₂ a₃₃]) - a₁₂ * det([a₂₁ a₂₃]

[a₃₁ a₃₃]) + a₁₃ * det([a₂₁ a₂₂]

[a₃₁ a₃₂])

Expanding the determinants of the 2x2 matrices in det(A), we have:

det(A) = a₁₁ * (a₂₂ * a₃₃ - a₂₃ * a₃₂) - a₁₂ * (a₂₁ * a₃₃ - a₂₃ * a₃₁) + a₁₃ * (a₂₁ * a₃₂ - a₂₂ * a₃₁)

Comparing det(A') and det(A), we can see that the only difference is the coefficients of the first row elements. Specifically, the coefficients in det(A') are multiplied by c.

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Answer:

it represents a polynomial

Answer:

\( \sf \: 3x + 12 \)

Step-by-step explanation:

Now we have to,

→ Simplify the given expression.

The property we use,

→ Distributive property.

The expression is,

→ 3(x + 4)

Let's simplify the expression,

→ 3(x + 4)

→ 3(x) + 3(4)

→ (3 × x) + (3 × 4)

→ 3x + 12

Hence, the answer is 3x + 12.

Answer:

max at (- 6, 18 )

Step-by-step explanation:

Given the equation of a parabola in intercept form

y = a(x + c)(x + d)

• If a > 0 then min vertex

• If a < 0 then max vertex

y = - 2(x + 9)(x + 3) ← is in intercept form

with a = - 2 < 0 then max vertex

y = - 2(x + 9)(x + 3) ← expand factors using FOIL

  = - 2(x² + 12x + 27) ← distribute parenthesis by - 2

y = - 2x² - 24x - 54 ← in standard form

with a = - 2 and b = - 24

The x- coordinate of the vertex is

x = - \(\frac{b}{2a}\) = - \(\frac{-24}{-4}\) = - 6

Substitute x = - 6 into the equation and evaluate for y

y = - 2(- 6 + 9)(- 6 + 3) = - 2(3)(- 3) = 18

vertex = (- 6, 18 ) and is a max

Answer:

Step-by-step explanation:

The layout looks like this.

r-----------s-----------------t

    6.4        

----------------9.3-----------

Now you want st so the formula is

rt = rs + st

9.3 = 6.4 + st            Subtract 6.4 from both sides

9.3 - 6.4 = st             Combine

st = 2.9

The equation of the regression line for the given data can be determined by performing linear regression analysis.

The regression line represents the best-fit straight line that describes the relationship between the independent variable (number of years studied) and the dependent variable (proficiency exam grades). The equation of the regression line can be expressed as y = a + bx, where y is the predicted value of the dependent variable, x is the independent variable, a is the y-intercept, and b is the slope of the line.

To find the equation of the regression line, we first need to calculate the slope and y-intercept using the given data. We can use statistical software or a calculator to perform the regression analysis and obtain the values of a and b. Once we have these values, we can plug them into the equation of the regression line to get the final equation.

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Answer:1.45

Step-by-step explanation:

Divide.

Ouch that question doesn't give much information for me to understand what I need to do sorry lol

We must invest  396.90, at an interest rate of 8.

Hobby is the fee you pay to borrow cash or the cost you price to lend money. interest is most customarily contemplated as an annual percent of the amount of a mortgage. This percent is called the interest price on the loan. for example, a bank will pay you interest when you deposit your money in a savings account.

The forms of interest consist of simple hobby, accumulated hobby, and compounding hobby. while money is borrowed, generally via the way of a loan, the borrower is required to pay the interest agreed upon by the two events.

There has been a energetic hobby inside the elections inside the final  weeks. She'd appreciated him in the beginning, but soon lost interest. Synonyms: significance, issue, importance, moment extra Synonyms of interest. countable noun.

value = Amount*(1+i)n

                     = 500*(1+.08)3

                         = 500*0.7938

                  Present value = 396.90

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Answer:

????

Step-by-step explanation:

Answer:

Width=22, Length=27, Area= 594

Step-by-step explanation:

Let the width if the rectangle be represented by x

If the length is 5 more than the width

Length =x+5

The perimeter is given by

2(x)+2(x+5)=98

2x+2x+10=98

4x=88

x=22

Width=22

Length=27

Area= 22*27=594

Answer:

Step-by-step explanation:

The derivatives of the frame field, analogous to the Serret-Frenet equations, are given by V₁' = κ₃V₂ - κ₂V₃, V₂' = -κ₃V₁ + κ₁V₃, and V₃' = κ₂V₁ - κ₁V₂ for some function κᵢ(s).

In this generalized Frenet frame for a unit speed curve r:[a,b]→R³, we start with the tangent vector V₁ = T, which represents the direction of the curve. We then choose V₂ as any unit vector field defined along r(s). Finally, V₃ is obtained by taking the cross product of V₁ and V₂, giving us the frame {V₁, V₂, V₃}.

To find the derivatives of this frame field, we differentiate each vector with respect to the curve parameter s. Applying the product rule and using the properties of cross products, we obtain the derivatives as follows:

V₁' = κ₃V₂ - κ₂V₃,

V₂' = -κ₃V₁ + κ₁V₃,

V₃' = κ₂V₁ - κ₁V₂.

Here, κ₁, κ₂, and κ₃ are functions of s, which represent the curvature of the curve in different directions. These functions determine how the frame vectors change along the curve.

These equations resemble the Serret-Frenet equations but have an additional term involving V₃, reflecting the choice of V₂ as a vector field along the curve. The values of κ₁, κ₂, and κ₃ depend on the specific curve and can be calculated using differential geometry techniques.

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Answer:

AEFsdgfdhzfddf

Step-by-step explanation:

\( \purple{ \tt{ \huge{ \: ✨Answer ✨ \: }}}\)

\(I \: \: Think \: \: The \: \: Answer \: \: Is \: \: \red{ \boxed{ \boxed{ \huge{ \tt{{ \: 392 \: }}}}}}\)

Answer:

2.) Isaiah started with 421 letters. At each stop he makes, he delivers 29 letters. How many letters are leftover? *

Step-by-step explanation:

Answer:

x = 39

m ∠1 = 63°

m ∠2 = 117°

Step-by-step explanation:

m∠1 + m∠2 = 180° since they are adjacent linear angles lying on the same straight line

Therefore x + 24 + 3x = 180

4x + 24 = 180

4x = 180-24 = 156

x = 156/4 = 39

Therefore x = 39 (a)

FOr (b) substitute this value of x = 39 into each equation

m∠1 = x + 24 = 39 + 24 = 63°

m∠2 = 3x = 3(39) = 117°

Answer: Infinite

Step-by-step explanation:

Answer:

one solution, r = - 2

Step-by-step explanation:

4(2r - 1) = - 2(3r + 16) ← distribute parenthesis on both sides

8r - 4 = - 6r - 32 ( add 6r to both sides )

14r - 4 = - 32 ( add 4 to both sides )

14r = - 28 ( divide both sides by 14 )

r = - 2

Answer:

Answer: y=3/2x-4

Answer:

6

3

2

Step-by-step explanation:

Answer:

No, it's c, good try though

Step-by-step explanation:

0=0 is true which means no matter what x is, it will be true. If it said 0=1 or something it would be no solution because no matter what, that is not true

Answer:

there are many solutions.

Step-by-step explanation:

because you Combine like terms: 6x + -6x = 0

0 = 0

and the Solution is going to be many solutions like

0 = 0

Assuming the interest is compounded semiannually, the interest rate that would be required in order for Brenda to end up with $6,520.02 is 0.68 or 68%.

Mathematically, compound interest can be calculated by using this formula:

A(t) = P(1 + r/n)^{nt}

Where:

Substituting the given parameters into the compound interest formula, we have;

6,520.02 = 4,848(1 + r/2)^{2 × 6}

1.34488861386 = (1 + 0.5r)^{12}

1.34488861386 = (1.5r)^{12}

Taking the 12th root of both sides of the equation, we have:

1.02499998664 = 1.5r

r = 1.02499998664/1.5

r = 0.68 or 68%.

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Answer:

B. :>

Step-by-step explanation:

Answer:

B. 7.735 km

Step-by-step explanation:

The height of a mountain is 7735 meters. What is its height in kilometers?

✓ It is: 7735/1000 = 7.735 kilometers

Answer: B

as 1000 metres = 1 km

Answer:

50 dollars.

Step-by-step explanation:

19 x 25= 475

1,425 - 475= 950

950 divided by 19 is 50.

Answer:

x=55

y=105

Step-by-step explanation:

75+ 2x-5 =180 ( supplementary angle)

2x=180-70

x=110/2

x=55

2x-5 = y (vertically opposite)

110-5=y

y=105

Taner will only need to run 3 km this week to complete his 6 km running goal.

If we require a definition, we may start by saying that fractional numbers are numbers that symbolize one or possibly more portions of a unit that has been subdivided into equal parts.

Given that, Taner's overall running goal is 6 km (including last week and this week)

So,

Taner's 2-week goal is 6 kilometres.

Now,

Taner's goal for the week is 3 kilometres = (6/2).

As the Taner completed 3 km of running last week. Taner can achieve his objective this week by running just 3 miles.

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The random variable in an experiment which consists of determining the speed of automobiles on a highway by the use of radar equipment is a continuous random variable. Option c is correct.

A random variable is a variable whose value is subject to variations as a result of a random event. Random variables can be classified as continuous or discrete.

A continuous random variable is a variable that can take on any value within a specified range of values, whereas a discrete random variable is a variable that can take on only specific values, with gaps between them.

The random variable in the experiment given is the speed of automobiles on a highway, and it can take on any value within a specified range of values, making it a continuous random variable.

Thus, option (c) - continuous - is the correct answer.

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Answer:

are not  

Step-by-step explanation:

it is clear I can explain in the comment section ... because I don not want you to lose time