PLEASE PLEASE HELP. I will make you brainlest.

According to the question last semester, a certain professor gave 22 as out of 197 grades The probability that a student received an A is approximately 0.1117 or 11.17%.

To calculate the probability that a student received an A, we need to know the total number of grades given and the number of A grades.

Given:

Total number of grades = 197

Number of A grades = 22

The probability of receiving an A can be calculated as:

Probability of receiving an A = Number of A grades / Total number of grades

Probability of receiving an A = 22 / 197

Probability of receiving an A ≈ 0.1117

Therefore, the probability that a student received an A is approximately 0.1117 or 11.17%.

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Answer:

x= -2 y= -1

Step-by-step explanation:

To solve by Substitution you would make this equation equal to each other x+1=3x+5 from there you would solve for x subtract x on both sides. and subtracting 5 from both sides 2x= -4 then divide by 2 to get x by itself x=-2 since we now found what the value of x is you can now plug in x into one of the origunal equations and get your answer for y which is y=-1

The equation model of the given statement in question is 6 + 7× x.

The model of equation is defined as the model of the given situation in the form of an equation using constants and variables.

In math, it deals with numbers of operations given according to the statements. The four major arithmetic operators are, addition, subtraction, multiplication, and division.

Given that;

6 is added to product of a number and 7

Now,

Let, the number multiplied by 7 be x,

=7*x

6 is added to the product;

= 6 + 7 × x

Therefore, the equation of model will be given as 6 + 7 × x;

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9514 1404 393

Answer:

  15

Step-by-step explanation:

The given range of numbers is -20 to 10, so is 10-(-20)+1 = 31 numbers. Since the end points of the range are both even, there is one more even number than there are odd numbers in the range. The number of odd numbers is ...

  (31 -1)/2 = 15

There are 15 odd numbers between -20 and 10.

Option A is correct.The equation for the parabola is A.(x - 3)^2 = 2(y - 2.5)

The equation for a parabola with a focus (h, k) and a directrix y = a can be expressed as:

(x - h)^2 = 4a(y - k)

The focus is (3, 4) and the directrix is y = 2, we can substitute these values into the equation:

(x - 3)^2 = 4(2)(y - 4)

Simplifying:

(x - 3)^2 = 8(y - 4)

The correct equation for the parabola is:

(x - 3)^2 = 8(y - 4)

Therefore, the answer is option A. (x - 3)^2 = 2(y - 2.5)

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The correct statement about the function is '' It is wider and shifted 3 units to the right''.

Function; \(\rm f(x) = |x|\)

Which describes how the parent function, f(x) = |x|, is transformed to show the function f(x) = 0. 1|x – 3|?

The function is;

\(\rm f(x) = |x|\)

First, the function is translated right into 3 units.

So, we have:

\(\rm f'(x) =|x-3|\)

The function is enlarged horizontally by a factor of 0.1.

\(\rm f''(x) =0.1|x-3|\)

The above highlights mean that:

\(\rm f'(x) =|x-3| \) will be wider than \(\rm f(x) = |x|\).

Hence, It is wider and shifted 3 units to the right.

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Answer:

-14x+21

Step-by-step explanation:

The probability that exactly two of the four persons selected live in their own household and are income-qualified is approximately 0.1075 or 10.75%.

Probability of success (p): The probability that a person selected from the population lives in their own household and is income-qualified. From the given information, p = 0.84.

Probability of failure (q): The probability that a person selected from the population does not live in their own household and is not income-qualified. Since q is the complement of p, we have q = 1 - p = 1 - 0.84 = 0.16.

Number of trials (n): We are selecting four persons from the population, so n = 4.

Number of successes (k): We want exactly two persons to live in their own household and be income-qualified, so k = 2.

Now we can calculate the probability using the binomial probability formula:

P(X = k) = C(n, k) * p^k * q^(n-k)

where C(n, k) is the binomial coefficient, given by C(n, k) = n! / (k! * (n-k)!).

Plugging in the values, we get:

P(X = 2) = C(4, 2) * (0.84)²* (0.16)⁽⁴⁻²⁾

Calculating the binomial coefficient:

C(4, 2) = 4! / (2! * (4-2)!) = 4! / (2! * 2!) = 6.

Substituting the values:

P(X = 2) = 6 * (0.84)² * (0.16)⁽⁴⁻²⁾

Calculating the result:

P(X = 2) = 6 * 0.84² * 0.16²

= 6 * 0.7056 * 0.0256

= 0.1075 (approximately)

Therefore, the probability that exactly two of the four persons selected live in their own household and are income-qualified is approximately 0.1075 or 10.75%.

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Answer:

\(sin^2(\pi/4)+cos^2(\pi/4)=1\)

Step-by-step explanation:

Notice that you don't need to evaluate the actual sin and cos functions, since you are in the presence of a well known Pythagorean identity that states that this type of addition of squares for the same angle should equal 1:

\(sin^2(x)+cos^2(x)=1\)

So, as long as the angle "x" is the same in both trig functions, this addition should render "1" (one).

Because in this case the angle involved is the same (in both cases pi/4), the identity is valid.

According to Pythagorean theorem:

To find the missing length of the leg we'll convert the equation:

Simplify:

\(\large\bf{\underline{\underline{\mathfrak{Question}:}}}\)

The hypotenuse of a right triangle has a length of 14 units and side that is 9 units long. which equation can be used to find the length of the remaining side?

\(\large\bf{\underline{\underline{\mathfrak{Solution}:}}}\)

To solve the problems of a right angle triangle we commonly used Pythagoras theorem. It is the most widely used theorem which helps in finding the missing length of a right angle triangle.

According to Pythagoras theorem, the sum of square of base and the square of perpendicular give us square of hypotenuse.

\(:{\Longrightarrow{\large{\rm{H^2=P^2+B^2}}}}\)

In a right angle triangle there are two legs and a hypotenuse.

Given that,

\({:\Longrightarrow{\small{\rm{Hypotenuse\:of\:a\:right\:triangle=14\:units.}}}}\)

\(:{\Longrightarrow{\small{\rm{A\:side\:of\:a\:right\:triangle=9\:units.}}}}\)

By putting these values in the Pythagoras theorem we get;

\(:{\Longrightarrow{\small{\rm{14^2=9^2+B^2}}}}\)

Let B = x

\(:{\Longrightarrow{\small{\rm{196=81+x^2}}}}\)

\(:{\Longrightarrow{\small{\rm{196-81=x^2}}}}\)

\(:{\Longrightarrow{\small{\rm{115=x^2}}}}\)

\(:{\Longrightarrow{\small{\rm{\sqrt{115}=x}}}}\)

use the formula 2πr

the c bit I did the whole process cuz the diameter is given and for the d bit i thought what you were trying to say is 25 diameter.

hope it helps and don't forget to put the units wherever necessary.!!!!

The given statement " When the film is placed into the XCP (extension cone paralleling) holder with the smooth side of the film towards the throat, after processing, it will appear darker" is false because it will  lighter, not darker.

The smooth side of the film is the side that interacts with the X-ray radiation and receives the image, while the emulsion side contains the light-sensitive crystals that react to the radiation.

Placing the smooth side towards the throat ensures that the image is sharp and clear, as the X-ray beam travels through the teeth and soft tissues before reaching the film.

After processing, the exposed areas of the film turn dark, representing the captured X-ray image, while the unexposed areas remain light or clear.

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The given expression is of the form y=mx+c. Comparing, we get the slope as 7.

The direction and steepness of a line are represented numerically by the slope or gradient of the line. It provides the ratio of how much y rises when x rises by a particular amount. The general form is therefore y=mx+c, where c represents the y-intercept and m represents the slope. This form gives the slope-intercept form.

Given the expression is  y=7x+3. Comparing this expression with the general form we get, slope or gradient as 7 and y-intercept as 3. Therefore, the required answer is 7.  

The complete question -

What is the gradient of the line y=7x+3?

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Answer:

Step-by-step explanation:

All I am saying its not 1 or 3

Answer:2,4,8,16,32,64,128,256,512,1024,2048,4096

Step-by-step explanation:

You just mutiply the number with 2

sec θ + tan θ / tan θ - sec θ + tan θ / sec θ =cos θ cot θ is equivalent to (1+2sin θ)/cos² θ = 1/sin θ.

Let's simplify the given expression:

sec θ + tan θ / tan θ - sec θ + tan θ / sec θ= [(sec θ * sec θ + tan θ * tan θ)/sec θ * tan θ] + [(sec θ * tan θ + sec θ * tan θ)/sec θ * tan θ]

                                                                      = (1/cos² θ) + (2sin θ/cos² θ)

                                                                      = (1+2sin θ)/cos² θcos θ cot θ= cos θ/cos θ * sin θ= 1/sin θ

Thus,sec θ + tan θ / tan θ - sec θ + tan θ / sec θ =cos θ cot θ is equivalent to (1+2sin θ)/cos² θ = 1/sin θ.

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The best way to select a random sample of students is "Ask every 20th student during lunch in the school cafeteria".

The model approach to picking a random sample of students to gather data on teens' music tastes is to ensure that each student has an equal chance of getting chosen. This is known as random sampling, and it assists in reducing biases and ensuring that the sample is representative of the total population.

Option C, Asking every 20th kid during lunch in the school cafeteria, would be the best decision among the possibilities presented.

By picking every 20th student, a decent amount of randomization is achieved, and each student has an equal chance of being included in the sample.

When compared to the other choices, this technique generates a more representative sample.

Hence, the correct answer is C.

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The confidence interval and critical value methods are equivalent in providing an interval estimate, the p-value method is used for hypothesis testing and evaluates the strength of evidence against the null hypothesis.

What is the confidence interval?

A confidence interval is a range of values that is likely to contain the true value of an unknown population parameter, such as the population mean or population proportion. It is based on a sample from the population and the level of confidence chosen by the researcher.

In general, when dealing with inferences for two population proportions, the confidence interval method and the critical value method are equivalent. These two methods provide a range of plausible values (confidence interval) for the difference between two population proportions and involve the calculation of critical values to determine the margin of error.

On the other hand, the p-value method is not equivalent to the confidence interval and critical value methods. The p-value method involves calculating the probability of observing a test statistic as extreme as, or more extreme than, the one obtained from the sample data, assuming the null hypothesis is true. It is used in hypothesis testing to determine the statistical significance of the difference between two population proportions.

To summarize:

- Confidence interval method: Provides a range of plausible values for the difference between two population proportions.

- Critical value method: Uses critical values to determine the margin of error in estimating the difference between two population proportions.

- P-value method: Determines the statistical significance of the observed difference between two population proportions based on the calculated p-value.

Hence, the confidence interval and critical value methods are equivalent in providing an interval estimate, the p-value method is used for hypothesis testing and evaluates the strength of evidence against the null hypothesis.

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Answer:

  1st to 4th: Sam, Cras, Randy, Charte

Step-by-step explanation:

The places are determined by putting the times in increasing order.

time, place, name

25.85, 1st place, Sam

25.90, 2nd place, Cras

32.20, 3rd place, Randy

32.28, 4th place, Charte

_____

Additional comment

Sometimes it is easier to compare values when they all have the same number of decimal places.

Answer: False

Step-by-step explanation: It is false because the y-coordinate is the range.

The diameter of Earth in kilometers is approximately 12,682 km, making option D the correct answer.

To convert the diameter of Earth from miles to kilometers, we can multiply the given diameter in miles by the conversion factor of 1.6 kilometers per mile.

Given that Earth's diameter is 7,926 miles, we can calculate its diameter in kilometers as follows:

Diameter in kilometers = Diameter in miles × Conversion factor

Diameter in kilometers = 7,926 miles × 1.6 kilometers/mile

Diameter in kilometers = 12,681.6 kilometers

Rounding this value to the nearest whole number, we get 12,682 kilometers.

Therefore, the correct answer is option D: 12,682 km.

Option A: 49,553 km is not the correct answer. It is not consistent with the given diameter of Earth.

Option B: 120,586 km is also not the correct answer. It is not consistent with the given diameter of Earth.

Option C: 1,392,650 km is significantly larger than the actual diameter of Earth and is not a plausible value.

In conclusion, the diameter of Earth in kilometers is approximately 12,682 km, making option D the correct answer.

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Given the radius r and the tangent line AB, the length of the line OA is 24 units

The radius r and the tangent line AB meet at a right angle.

By Pythagoras theorem, we have:

AB² = OA² + r²

So, we have:

24² = OA² + 7²

Rewrite as:

OA² = 24² - 7²

Evaluate

OA² = 527

Take the square root of both sides

OA = 23

Hence, the length of OA is 24 units

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Answer:

The best estimate of each owner share is 296

Step-by-step explanation:

Now, we know that that the profit was shared equally and we have 13 recipients of the share

The best estimate for each owner’s share is to divide the amount shared in the month by the number of the recipients

That would be 3,849/13 = 296.08

This is best estimated as 296

\(\large{\rm{\underline{\underline{Answer:}}}}\)

Given, 6 batteries for £2.79

(They are of same type, so each of them are of same cost. )

~Simply divide the total price of 6 batteries by 6 to get the price of each battery,

\( = \dfrac{£2.79 }{6} \)

\( = £ \dfrac{279}{100 \times 6} \)

\( = £ \dfrac{46.5}{100} \)

\( = £0.465\)

Thus, cost of each battery is £ 0.465 (ans)

Las viñetas o numerales en un juego de patio se utilizan para marcar el progreso de un juego o actividad.

Por ejemplo, en un juego de rayuela, cada viñeta representa un paso hacia el objetivo final y los jugadores avanzan saltando sobre las viñetas en un orden determinado.

En otros juegos, las viñetas o numerales se utilizan para llevar un registro de la puntuación de los jugadores o para determinar el orden en que deben realizarse las acciones.

En resumen, las viñetas o numerales son un elemento importante en muchos juegos de patio y pueden ser utilizadas de diversas maneras para marcar el progreso, la puntuación o el orden de las acciones en un juego.

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oml, this is false. truely false!!

hope this helps ya! :)

The output, y, when the input, x, is -5 is -2

The input is given as:

-5

This means that

x = -5

This is so because x represents the input

From the graph, we have the following highlight

The line of the graph passes through the point x = -5

On the graph;

When x = -5, the value of y is -2

This means that the output, y, when the input, x, is -5 is -2

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