in the context of the measures of reliability, correlating the total score of the first 20 questions on a test with the total score of the last 20 questions on a test is an example of

The slope of the line passing through the points (-5, -4) and (-13, 2) is -3/4.

Slope is simply expressed as a change in y over the change in x.

It is expressed as

\(m = \frac{y_2 - y_1}{x_2 - x_1}\)

Given the points:
(-5, -4) and (-13,2)​

Point (-5, -4):

x₁ = -5

y₁ = -4

Point (-13,2)​:

x₂ = -13

y₂ = 2

Plug the given x and y values into the slope formula and simplify.

\(m = \frac{y_2 - y_1}{x_2 - x_1}\\\\m = \frac{2 - (-4)}{-13 - (-5)}\\\\m = \frac{2 + 4}{-13 + 5}\\\\m = \frac{6}{-8}\\\\m = -\frac{3}{4}\)

Therefore, the slope of the line is -3/4.

Learn more about slope formula here: brainly.com/question/24578307

#SPJ1

Answer:

14,20.84,12,110,124.32

Answer:

a = 40

t = 1

x = 6

x = 11

Step-by-step explanation:

1.

3/8 = 15/a

multiply both sides by a, then multiply by the reciprocal of 3/8

a = 8*15/3

2.

multiply both sides by 2

t = 1

3.

multiply both sides by 5

x - 3 = 30/10

x = 6

4.

multiply both sides by x - 5, then multiply by the reciprocal of 10/15

60/10 = x - 5

x = 6

Answer:

D, E, G

Step-by-step explanation:

Quotient of 82 and a number=82/n

Decreased by 26

82/n-26

She evaluate the expression when n=2

82/n-26

When n=2

82/2-26

=41-26

=15

Answer

D. The correct expression is 82/n-26

E.The operations include division and subtraction.

G.The value of the expression is 15

Answer:

The correct answer is b,d,e,g

Step-by-step explanation:

Answer:

you know 2 sides are the same on an a silly triangle.. I mean isosceles.. so the hypotenuse will be longer but the other two sides are the same

use \(C^{2}\) = \(A^{2}\) + \(B^{2}\)  ( Pythagoras theorem )

Step-by-step explanation:

\(4^{2}\) = \(A^{2}\) +\(A^{2}\)  ( b/c the side are the same length the can both be called A )

16 = 2\(A^{2}\)

8 = \(A^{2}\)

\(\sqrt{8}\) = A

not a whole number but.. it's still a good answer square root of 8 is about 2.8284 on my calculator

Answer:

If the shipping is for all books then the total cost is 164.95

\( \: \: \: \: \: \)

\( = \: \: \: x = - \frac{3}{2 } \\ \\ \)

refer to attachment

\( \: \: \: \: \: \)

Answer:

6,000

Step-by-step explanation:

Answer:

1. square root 187.61 OR 13.7

2. square root 115 OR 10.7

Step-by-step explanation:

I believe these are right, if they are not tell me

goal:tan^5x=tanx(sec²x-2sec²x+1)

proof: from l.h.s to r.h.s

tan^5x=(tanx)^5=((tanx)(tan²x)(tan²x))

from trigonometry identity

(tan²x)=sec²x-1

tan^5x=(tanx(sec²x-1)(sec²x-1))

=(tanx(sec^4x-sec²x-sec²x+1))

=(tanx(sec^4x-2sec²x+1))

proved

the wavelength of the electron is approximately 122 nm To find the wavelength of an electron, we can use the de Broglie wavelength formula:

wavelength (λ) = h / (m * v)

where:
- h is Planck's constant (6.63 x 10^-34 Js)
- m is the mass of the electron (9.11 x 10^-28 g, which needs to be converted to kg)
- v is the speed of the electron (5.97 mm/s, which needs to be converted to m/s)

Step 1: Convert the mass of the electron to kg:
9.11 x 10^-28 g * (1 kg / 1000 g) = 9.11 x 10^-31 kg

Step 2: Convert the speed of the electron to m/s:
5.97 mm/s * (1 m / 1000 mm) = 5.97 x 10^-3 m/s

Step 3: Plug the values into the de Broglie wavelength formula:
λ = (6.63 x 10^-34 Js) / (9.11 x 10^-31 kg * 5.97 x 10^-3 m/s)

Step 4: Calculate the wavelength:
λ = (6.63 x 10^-34 Js) / (5.44 x 10^-33 kg m/s) ≈ 1.22 x 10^-10 m

Step 5: Convert the wavelength to nm:
1.22 x 10^-10 m * (1 x 10^9 nm / 1 m) ≈ 122 nm

So, the wavelength is approximately 122 nm.

to learn more about wavelength click here :

brainly.com/question/24452579

#SPJ11

Answer:

True.

Step-by-step explanation:

If I = prt, They are all being multiplied together, therefor being constant.

To solve the question we must know about Logarithm.

A log function is a way to find how much a number must be raised in order to get the desired number.

\(a^c =b\)

can be written as

\(\rm{log_ab=c\)

where a is the base to which the power is to be raised,

b is the desired number that we want when power is to be raised,

c is the power that must be raised to a to get b.

For example, let's assume we need to raise the power for 10 to make it 1000 in this case log will help us to know that the power must be raised by 3.

\(\rm{log_{10}1000=3\)

The value of input can not be negative, the value of x is 8.

\(\rm{ log_2x+log_2(x-6)= 4\)

        \(\rm{ log_2x(x-6)= 4\)

        \( x(x-6)= 2^4\)

        \(x^2 -6x -16=0\\ x^2 -8x +2x-16=0\\ x(x-8)+2(x-8)=0\\ (x+2)(x-8) = 0\)

Equating factors against 0,

1.    \((x+2)=0\\ x=-2\)

2.     \((x-8)=0\\ x=8\)

As the value of input can not be negative, the value of x is 8.

Hence, the value of x is 8.

Learn more about Logarithm:

https://brainly.com/question/3072484

Answer:

The answer is C

Step-by-step explanation:

C) x2 – 6x – 16 = 0

Answer:

about =502.65

Step-by-step explanation:

Answer:

a. The size of angle x is 126

b. alternate angles are equal

Step-by-step explanation:

a. Angles on a straight line add up to 180

This implies 54+x=180

×=180-54

x=126

The length of shorter leg is 15 inches, length of longer leg is 36 inches and the length of hypotenuse is 39 inches.

What is right triangle?

A right triangle, also known as a right-angled triangle, an orthogonal triangle, or formerly a rectangled triangle, is a triangle with one right angle, meaning that its two sides are perpendicular. Trigonometry's foundation is the relationship between the right triangle's sides and other angle.

Let,

x = Longer leg of triangle

y = Shorter leg of triangle

h = Hypotenuse of triangle

Given: The length of the longer leg of a right triangle is 6inches more than twice the length of the shorter leg.

The length of the hypotenuse is 9inches more than twice the length of the shorter leg.

⇒  x = 6 + 2y

   h = 9 + 2y

The given triangle is a right angled triangle.

⇒                                 x^2 + y^2 = h^2

                         (6 + 2y)^2 + y^2 = (9 + 2y)^2

               36 + 24y + 4y^2 + y^2 = 81 + 36y + 4y^2

                         36 + 24y + 5y^2 = 81 + 36y + 4y^2

36 - 81 + 24y - 36y + 5y^2 - 4y^2 = 0

                            -45 - 12y + y^2 = 0

                              y^2 - 12y - 45 = 0

                      y^2 - 15y + 3y - 45 = 0

                       y(y - 15) + 3(y - 15) = 0

                                (y - 15)(y + 3) = 0

y - 15 = 0,   y + 3 = 0

y = 15,     y = -3

Since the length is not negative.

So, y = 15

Hence,

Shorter leg = 15 inchs

Longer leg = 6 + 2y = 6 + 2(15) = 36 inches

Hypotenuse = 9 + 2y = 9 + 2(15) = 39 inches

To know more about right triangle, click on the link

https://brainly.com/question/29801705

#SPJ4

Answer:

Step-by-step explanation:

Precision is defined as the ratio of true positives (TP) to the total predicted positives (TP + FP). In this case, the confusion matrix shows 46 TP and 4 FP, so the precision can be calculated as:

precision = TP / (TP + FP) = 46 / (46 + 4) = 0.92

Rounding to 2 decimal places, the precision ratio is 0.92.

Answer:

Below

Step-by-step explanation:

Start with point (3,5) slope (5/3) form:

(y-5) = 5/3 (x-3)        expand

y-5 = 5/3 x -5          re-arrange by adding 5 to both sides

y = 5/3 x                    done!

Answer:

25x

Step-by-step explanation:

\(-5x\left(-5\right)\)

Frist Multiply the numbers: 5(-5) = -25

\(=-\left(-25\right)x\)

remove the parentheses.

=25x

Answer: 25x

Step-by-step explanation:

According to a recent survey of 1,001 adult Canadians, 27 percent of respondents indicated that they do not want to be unionized.

The survey of 1,001 adult Canadians asked respondents about their preference regarding unionization. Out of the total respondents, 27 percent expressed that they do not want to be unionized. This percentage represents the proportion of individuals who indicated a lack of interest or desire to be part of a labor union.

It is important to note that without additional information about the survey methodology, sample representation, and any potential biases, the result should be interpreted within the context of the survey's limitations. The percentage obtained from the survey reflects the preferences of the respondents in the sample but may not necessarily represent the opinions of the entire population of adult Canadians.

Learn more about proportion here:

https://brainly.com/question/31548894

#SPJ11

Answer:

y > 4x + 1

Step-by-step explanation:

Look at the graph. The y-intercept is 1, so we have

y = mx + 1

Now let's find the slope.

Go from the intercept 4 units up and 1 unit to the right. You are at point (1, 5) which is a point on the graph.

slope = m = rise/run = 4/1 = 4

The equation of the dashed line is

y = 4x + 1

The shaded area is "above" the line, so the inequality is

y > 4x + 1

Answer:

y > 4x + 1

Step-by-step explanation:

Hope this is right.

1. The margin of error can be determined by using the following formula: Margin of error = z*√(p^(1-p^)/n)Where z is the z-score for the confidence level, p^ is the sample proportion, and n is the sample size.

For a 90% confidence level, the z-score is 1.645. Therefore, the margin of error is:Margin of error = 1.645 * √((0.27*(1-0.27))/590)≈ 0.0472 or 0.047 (rounded to three decimal places)

2. To find the margin of error at a 99% confidence level, we can use the formula:Margin of error = z*√(p^(1-p^)/n)For a 99% confidence level, the z-score is 2.576.

Therefore, the margin of error is:Margin of error = 2.576 * √((0.1*(1-0.1))/550)≈ 0.0464 or 0.046 (rounded to three decimal places)

3. The formula for a confidence interval for a proportion is:p^ ± z*(√(p^(1-p^)/n))where z is the z-score for the desired confidence level.For a 95% confidence level, the z-score is 1.96. Therefore, the confidence interval is:0.85 ± 1.96*(√(0.85*(1-0.85)/500))≈ 0.819 to 0.881 (rounded to three decimal places)

4. The formula for sample size required to achieve a desired margin of error is:n = (z^2 * p^*(1-p^))/E^2where z is the z-score for the desired confidence level, p^ is the estimated proportion, and E is the desired margin of error. Rearranging this formula to solve for n, we get:n = (z^2 * p^*(1-p^))/E^2For a 90% confidence level and a desired margin of error of 4%, the z-score is 1.645 and the estimated proportion is 0.5 (assuming no prior information is available).

Therefore, the sample size required is:n = (1.645^2 * 0.5*(1-0.5))/(0.04^2)≈ 426.122. Rounded up to the nearest whole number, the sample size required is 427.5. To obtain a margin of error of 4% with a 99% confidence level, the z-score is 2.576. The estimated proportion is 0.5 (assuming no prior information is available).

Therefore, the sample size required is:n = (2.576^2 * 0.5*(1-0.5))/(0.04^2)≈ 676.36. Rounded up to the nearest whole number, the sample size required is 677.7. To obtain a margin of error of 4% with a 99% confidence level, given that the sample proportion is 0.2, we can use the following formula to calculate the required sample size:n = (z^2 * p^*(1-p^))/E^2where z is the z-score for the desired confidence level, p^ is the sample proportion, and E is the desired margin of error.

Rearranging this formula to solve for n, we get:n = (z^2 * p^*(1-p^))/E^2For a 99% confidence level, a margin of error of 4%, and a sample proportion of 0.2, the z-score is 2.576. Therefore, the sample size required is:n = (2.576^2 * 0.2*(1-0.2))/(0.04^2)≈ 1067.78. Rounded up to the nearest whole number, the sample size required is 1068.7. The formula for a confidence interval for a proportion is:p^ ± z*(√(p^(1-p^)/n))where z is the z-score for the desired confidence level.For a 95% confidence level, the z-score is 1.96.

Therefore, the confidence interval is:161/240 ± 1.96*(√((161/240)*(1-161/240)/240))≈ 0.627 to 0.760 (rounded to three decimal places)8. The sample proportion is the midpoint of the confidence interval, which is: (0.48 + 0.68)/2 = 0.58The margin of error is half the width of the confidence interval, which is: (0.68 - 0.48)/2 = 0.1

For more such questions on confidence level

https://brainly.com/question/30540650

#SPJ8

Answer:

19/20 punds

Step-by-step explanation:

I graduatiated 4th grade

Answer:

A. KE=1/2; B. KE=4; C. KE=24; D. KE=1

Step-by-step explanation:

A. KE=1/2*1*1²=1/2

B. KE=1/2*2*2²=1*4=4

C. KE=1/2*3*4²=1.5*16=24

D. KE=1/2*8*0.5²=4*0.25=1

Answer:

  about -0.79 mg/hour

Step-by-step explanation:

You want the rate of change of the amount of medication in a patient after 4 hours if the amount after t hours is modeled by y=88/(1+e^(t+0.7)).

The rate of change is found by taking the derivative of the function with respect to time. Let u = 1+e^(t+0.7). Then du/dt = e^(t +0.7).

The function can be written ...

  y = 88/u = 88·u^-1

so its derivative is ...

  dy/dt = (-88·u^-2)·du/dt

  dy/dt = -88(e^(t +0.7))/(1 +e^(t +0.7))^2

The value of the rate of change at t=4 is ...

  dy/dt = -88(e^(4 +0.7))/(1 +e^(4 +0.7))^2 ≈ -88(109.95)/(1 +109.95)^2

  dy/dt ≈ -0.78602 ≈ -0.79 . . . . . . mg/h

The rate of change in the amount of medication is about -0.79 mg/h.

sin(β−α) = -0.9345 is accurate to four decimal places.

Let's find the solution to the given problem.The given relationship is sin(A)cos(B) + cos(A)sin(B) = 0.985526. The relationship sin(A)cos(B) + cos(A)sin(B) = sin(A+B) is also known as the sum-to-product identity. We can therefore say that sin(A+B) = 0.985526.

Let sinα = 0.842 and sinβ = 0.586. This places both angles' terminal rays in the first quadrant. We can therefore find the values of cosα and cosβ by using the Pythagorean Identity which is  cos²θ + sin²θ = 1.  Here, cos²α = 1 - sin²α = 1 - (0.842)² = 0.433536 which gives cosα = ±0.659722.

Here, cos²β = 1 - sin²β = 1 - (0.586)² = 0.655956 which gives cosβ = ±0.809017. From the problem, we need to find the values of cos(α+β) and sin(β−α).

a) Using the sum identity, cos(α+β) = cosαcosβ - sinαsinβ, which is cosαcosβ - sinαsinβ = (0.659722)(0.809017) - (0.842)(0.586) = 0.075584.Therefore, cos(α+β) = 0.0756. This is accurate to four decimal places.b) Using the difference identity, sin(β−α) = sinβcosα - cosβsinα, which is sinβcosα - cosβsinα = (0.586)(0.659722) - (0.809017)(0.842) = -0.93445Therefore, sin(β−α) = -0.9345. This is accurate to four decimal places.

To know more about decimal refer here:

https://brainly.com/question/30958821

#SPJ11

Answer:

conjunction

Step-by-step explanation:

Answer:

Conjunction is correct answer. (I think)

the local time in Anchorage when the image was taken was 5:00 PM, and the local day was Dec. 2, 2011.

To determine the local time and day in Anchorage when the satellite image was taken, we need to consider the time difference between the Prime Meridian (0 degrees longitude) and Anchorage, Alaska (approximately 150 degrees west longitude).

Each time zone is approximately 15 degrees wide, representing a one-hour difference in local time. Anchorage is in the Alaska Standard Time (AKST) zone, which is typically UTC-9 (nine hours behind UTC) during standard time.

Given that Anchorage is about 150 degrees west of the Prime Meridian, we can calculate the time difference as follows:

150 degrees / 15 degrees per hour = 10 hours

Therefore, when the image was taken at 0300Z (3:00 AM), Dec. 3, 2011, at the Prime Meridian, the local time and day in Anchorage were:

3:00 AM - 10 hours = 5:00 PM, Dec. 2, 2011

So, the local time in Anchorage when the image was taken was 5:00 PM, and the local day was Dec. 2, 2011.

learn more about degrees here:

https://brainly.com/question/364572

#SPJ11

As per the rational root theorem, the actual root of the polynomial is  - 5/2

The term polynomial refers the algebraic expression in which the exponents of all variables should be a whole number

Here we have given that  f(x) = 6x⁴ + 5x³ – 33x² – 12x + 20.  and we need to find which is an actual root of f(x).

In order to find the root for the polynomial we have to apply each value as the replacement of x in the polynomial.

And then we have to find in which one makes the polynomial result as zero.

First we have to take the value of x as -5/2, then the polynomial equation be like,

Here we have to substitute x=-5/2, then we get

=> f(-5/2) = 6(-5/2)⁴ + 5(-5/2)³ - 33(-5/2)² - 12(-5/2) + 20

=> f(-5/2) = 6(625/16)-5(125/8)-33(25/4)+30+20

when we simplify this one then we get,

=> f(-5/2)=(1,875-625-1,650+400)/8

=>  f(-5/2)=0/8

Here we know that if we zero by any number we get the result as zero.

Therefore, f(-5/2)=0 then x=-5/2 is a root of f(x)

To know more about Polynomial here.

https://brainly.com/question/11536910

#SPJ4

Answer:

its A

Step-by-step explanation:

Just took the test