HELP ME

how do i do this. im terrifingly confused

In this case, the standard deviation is 3.7, so the variance is 3.7², or 13.69. This means that the data points in the data set are, on average, 13.69 units away from the mean.

The variance of a data set is a measure of how the data points are distributed around the mean. It is calculated by squaring the standard deviation, which is the average distance of the data points from the mean.

Variance is a useful measure for quantifying the spread and variability of the data points in a data set. By knowing the variance, it is possible to make predictions about how likely it is that a given data point will fall within a certain range from the mean.

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Due to the difference in the number of columns in A and B, the operation B+A is not defined. ACC - This operation cannot be defined because A's number of columns and C's number of rows are not equal.

A matrix is a row-and-column-organized rectangular array containing numbers, symbols, or expressions. In mathematics, science, and engineering, matrices are frequently used to represent and manipulate data as well as to resolve linear equation systems.

The following are defined given that A, B, and C are all 8 by 9 matrices:

A. B+A - This operation is not described because A and B have different numbers of columns.

B. ACC - This operation is undefinable since A's number of columns and C's number of rows are not equal.

C. C-B - This operation is not described because C has more rows than B does because B has more columns.

D. Assuming B is a matrix with a diagonal of 9, this operation is defined and produces a matrix with a diagonal of 3.

E. AB - This operation is known as AB if A's number of columns and B's number of rows are equal. The outcome is an 8 by 9 matrix.

F. CB - If the number of columns is 1, then this operation is defined.

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Due to the difference in the number of columns in A and B, the operation B+A is not defined. ACC - This operation cannot be defined because A's number of columns and C's number of rows are not equal. C-B - This operation is not described because C has more rows than B does because B has more columns.

A matrix is a row-and-column-organized rectangular array containing numbers, symbols, or expressions. In mathematics, science, and engineering, matrices are frequently used to represent and manipulate data as well as to resolve linear equation systems.

The following are defined given that A, B, and C are all 8 by 9 matrices:

A. B+A - This operation is not described because A and B have different numbers of columns.

B. ACC - This operation is undefinable since A's number of columns and C's number of rows are not equal.

C. C-B - This operation is not described because C has more rows than B does because B has more columns.

D. Assuming B is a matrix with a diagonal of 9, this operation is defined and produces a matrix with a diagonal of 3.

E. AB - This operation is known as AB if A's number of columns and B's number of rows are equal. The outcome is an 8 by 9 matrix.

F. CB - If the number of columns is 1, then this operation is defined.

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The value of h for which b in plane spanned by a1 and a2 is 3.

If b is spanned by a1 and a2, then for some constant x and y

b = x*a1 + y*a2

(3, -5, h) = x(1, 3, -1) + y(-5, -8, 2)

So we get equations

x - 5y = 3

3x - 8y = -5

-x + 2y = h

Solving x - 5y = 3 and 3x - 8y = -5

(3x - 8y) - 3(x - 5y) = -5 - 3*3

7y = -14

y = -2

Also x = 3 + 5y = 3 + 5*-2

So x = -7

Now h = -x + 2y

= -(-7) + 2*(-2)

= 7 - 4

= 3

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Step-by-step explanation:

Use the Pythagorean theorem: a^2 + b^2 = c^2. In this case, sides a and b are each 7sqrt(3), and c is the diagonal of the square.

a^2 + b^2 = c^2

(7sqrt3)^2 + (7sqrt3)^2 = c^2

294 = c^2

c = sqrt(294) = 7sqrt(6)

To add the two rational expressions, we need to find a common denominator:

3x + 2 / x - 1 + 2x - 5 / x - 1 = (3x + 2)(x - 1) / (x - 1)(x - 1) + (2x - 5)(x - 1) / (x - 1)(x - 1)

Now that we have a common denominator, we can add the numerators and simplify:

= (3x^2 - x + 2x - 5) / (x - 1)(x - 1)

= (3x^2 + x - 5) / (x - 1)(x - 1)

This is the simplified sum of the two rational expressions.

The primary reason for the use of random assignment in the research study was to ensure that participants in each group were similar to each other in terms of relevant factors, such as age, gender, or health status.

By randomly assigning participants into two groups, the researchers could ensure that any difference observed between the two groups was due to the intervention and not due to any other factor.

Random assignment eliminates the possibility of bias being introduced into the study, as the two groups are as similar as possible.

This means that any observed difference between the two groups can be attributed directly to the intervention, in this case, the vitamin E supplement.

By randomly assigning participants, the researchers could be sure that the results of the study were valid and could be relied upon.

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The average value for X is 9/18. Hence, the answer is D. 9.

The exponential distribution probability is given as P(X ≤ 9 ) = 1 − E−9/18. The average value for X is calculated as follows.

The expected value (mean) of an exponential distribution of a random variable X with rate parameter λ is given by E[X] = 1/λ.

In the given problem, λ = 18. Thus, the expectation of the random variable X is 1/18.

The calculation for the expected value of X can be represented as:

E[X] = 1/λ = 1/18

Thus, the average value for X can be represented as:

Average Value of X = E[X] = 1/18 = 9/18

Therefore, the average value for X is 9/18. Hence, the answer is D. 9.

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Answer: 3

Step-by-step explanation:

V is at its maximum when [tex]a = b\ \pi x[/tex],  [tex]V = \pi x2h[/tex], and [tex]c = a x2 + b\ \pi xh[/tex].

This question uses the principles of geometry, specifically the formulas for the area of a circle and the area of a curved surface. In addition, the concept of cost maximization is used to determine the cost of the tank when the volume is at its maximum.

Given,

[tex]c = a x2 + b\ \pi xh[/tex]

This equation states that the cost of the tank is equal to the cost of the base plus the cost of the curved surface.

The cost of the base is equal to the area of the base multiplied by the cost per square metre, which is a.

The area of the base is equal to [tex]\pi x2[/tex], where x is the radius of the base. The cost of the curved surface is equal to the area of the curved surface multiplied by the cost per square metre, which is b.

The area of the curved surface is equal to πxh, where h is the height of the tank.

Combining these two equations gives the equation for c.

[tex]V = \pi x2h[/tex]

This equation states that the volume of the tank is equal to the area of the base multiplied by the height.

The area of the base is equal to [tex]\pi x2[/tex], where x is the radius of the base. The height of the tank is h. Combining these two equations gives the equation for V.

V is at its maximum when [tex]a = b\pi x[/tex]

This equation states that the volume of the tank is maximized when the cost of the base is equal to the cost of the curved surface.

The cost of the base is equal to the area of the base multiplied by the cost per square metre, which is a.

The area of the base is equal to [tex]\pi x2[/tex], where x is the radius of the base. The cost of the curved surface is equal to the area of the curved surface multiplied by the cost per square metre, which is b.

The area of the curved surface is equal to πxh, where h is the height of the tank.

Setting a equal to bπx gives the equation for the maximum volume.

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The 12 in 12x+13

Reason:

A coefficient is the number to the left of a variable. The 12x has a coefficient of 12 and variable of x. We multiply the two items together.

12x = 12 times x = 12*x

Answer:

720

Step-by-step explanation:

Sum of the interior angles of any polygon is (n−2)×180.

So 6-2=4

4*180 = 720

There are other equations that have the same number of solutions as Priya's equation, y = -1/2x - 7. For instance:

y = -1/2x - 7 + k (where k would be any constant value)

or

y equals mx plus b, where m is -1/2 and b is -7.

The slope and y-intercept of the equations are the same as Priya's equation. This means that the equations will meet Priya's equation at exactly one point, giving them the same solution.  However, it is important to note that the constant value (k) or the y-intercept (b) can be changed to make the equation different from Priya's equation, but as long as the slope (m) remains the same, the two lines will intersect at exactly one point.

I determined that because both equations have the same slope (-1/2) and the same y-intercept (-7). This means that they will intersect at exactly one point on the coordinate plane, resulting in one solution in common.

The slope of a line is represented by the coefficient of x in the equation, and the y-intercept is represented by the constant term. In both equations, the slope is -1/2 and the y-intercept is -7, so they are the same line, and therefore will have exactly one solution in common.

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We are unable to establish causation or cause-and-effect correlations using observational data. Observational studies are fantastic for describing a particular group, contrasting groups, or looking at the patterns or relationships between variables.

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For finding median in continuous series, all of the four factors are important.

The median is a central value in a data set that separates the upper and lower halves of the data.

In a continuous series, it is important to find the median because it gives us a good indication of the typical value in the series.

To find the median in a continuous series, four factors are important:

a. Particular frequency of the median class: This refers to the number of observations that fall into the median class.

b. Lower limit of the median class: The lower limit of the median class defines the start of the interval in which the median falls.

c. Upper limit of the median class: The upper limit of the median class defines the end of the interval in which the median falls.

d. Cumulative frequency preceding the median class: This refers to the total number of observations that fall into classes before the median class.

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An object's distance from its beginning point during the course of its motion is displayed as a position-time graph. A line's slope increases with its steepness, and an object's motion changes more quickly as a result.

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Your height and the length of your shadow are related by the formula 1/Tangent (height of the sun). Your shadow would be 5.67 times longer than you if the sun were to be at its lowest point in the sky (10 degrees). At 5 degrees, the proportion is 11.43. (A person of average height (5.8 feet) would therefore cast a shadow that is 66 feet long.)

The length of the shadow is influenced by the Sun's position in the sky. The shadows are long when the Sun is low in the horizon. The shadows are substantially shorter when the Sun is high in the sky.

Because the sun's rays are slanted in the morning and evening but are directly overhead at noon, the shadows are longer in the morning and evening and shorter in the noon. The distance of the object from the light source affects how big the shadow is.

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The ratio of x/y is then 2/3, which is a positive number.

In quadrant I, both the x and y coordinates are positive. Therefore, a ratio of x/y will be positive. To illustrate this, let's say that the point (x, y) is located at (2, 3). This means that x=2 and y=3. The ratio of x/y is then 2/3, which is a positive number.

To calculate the ratio, we divide the x coordinate by the y coordinate: x/y = 2/3. This will give us the ratio of the point (x, y) in the indicated quadrant. If the result is a positive number, then the ratio is positive. If the result is a negative number, then the ratio is negative. In this example, the result is a positive number, so the ratio is positive.

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100 grams to convert the cups is 1/2 cup.

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Analytical techniques or a graphing tool can be used to locate the function's vertical asymptotes.

On a function graph, a vertical asymptote is a line that the graph approaches but never crosses. It can be discovered by examining the function's equation and how it behaves as it gets closer to infinity. By resolving the equation and determining the values of x that cause the denominator to equal 0, one can use analytical techniques to determine the vertical asymptotes of the function. For instance, the function will have a vertical asymptote at x = 5 if the equation is f(x) = (x-3)/(x-5), as the denominator of the equation equals 0 at this point. Vertical asymptotes can also be found using graphing tools. One can observe the behavior of the equation by charting its graph.

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The congruent angles of an isosceles right triangle measure is 45° each.

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The Area of the circle is  = 3.14 x (6 cm)^2

Area = 113.04 cm^2

The theory used in this question is the formula for the area of a circle, which states that the area of a circle is equal to π multiplied by the square of the radius.

given below

Step 1: Use the formula A = πr^2 to calculate the area of the circle.

Step 2: Identify the radius, r, which is equal to 6 cm.

Step 3: Substitute the values into the formula, A = πr^2.

Step 4: Calculate the area by multiplying 3.14 (π) by the square of 6 cm (6 cm x 6 cm).

Step 5: The area of the circle is 113.04 cm^2.

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Answer:

Addition (+)

Step-by-step explanation:

If we were to take the problem and form an expression, it would look like this:

3 times a number (3 ×?) decreased by 2 (- 2) divided by 6 (÷ 6)

Putting it all together it forms:

The four operations are addition, subtraction, multiplication and division.

We can see the multiplication, subtraction, and division, but not addition.

Therefore, the operation that is missing is Addition.

3% of children are likely to be ill in two days.

Let's call the fraction of children who are ill today x.

The fraction of children who are healthy today is (1 - x).

The fraction of children who were healthy today and will be healthy tomorrow is (1 - x) * 0.95.

The fraction of children who were ill today and will still be ill tomorrow is x * 0.55.

The fraction of children who will be ill in two days is x * 0.55 + (1 - x) * 0.05 = 0.55x + 0.05 - 0.95x = -0.4x + 0.05.

So, if 20% of children are ill today, then x = 0.2, and the fraction of children who are likely to be ill in two days is -0.4 * 0.2 + 0.05 = 0.03.

Therefore, 3% of children are likely to be ill in two days.

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3% of children are likely to be ill in two days.

Let's call the fraction of children who are ill today x.

The fraction of children who are healthy today is (1 - x).

The fraction of children who were healthy today and will be healthy tomorrow is (1 - x) * 0.95.

The fraction of children who were ill today and will still be ill tomorrow is x * 0.55.

The fraction of children who will be ill in two days is x * 0.55 + (1 - x) * 0.05 = 0.55x + 0.05 - 0.95x = -0.4x + 0.05.

So, if 20% of children are ill today, then x = 0.2, and the fraction of children who are likely to be ill in two days is -0.4 * 0.2 + 0.05 = 0.03.

Therefore, 3% of children are likely to be ill in two days.

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Here, the 11.5 oz of vinegar ingredient is needed in order to make 46 oz of furniture polish .

So in this problem it says a furniture polish can be made containing or combining vinegar and olive oil and the amount of oil should be three times the amount of vinegar. So I'm gonna make vinegar X. And oil three X. How much of each ingredient is needed in order to make 46 oz of furniture Polish. So I'm gonna go ahead and add these together. Okay. Yes. Which means that four x. equals 46 and divide by four So X. is 11.5. So that means that for vinegar we need 11.5 oz. And then I'm going to multiply that by three to get 34.5 oz for the oil. And if you can find those together just to check you get 46. So this would be the amount of both ingredients.

To make 46 oz of furniture polish, you will need 3 times as much olive oil as vinegar.

So, you need 46 oz / 4 = 11.5 oz of vinegar.

And 11.5 oz * 3 = 34.5 oz of olive oil.

Therefore,the 11.5 oz of vinegar ingredient is needed in order  to make 46 oz of furniture polish .

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[tex]\begin{array}{llll} \textit{Logarithm of exponentials} \\\\ \log_a\left( x^b \right)\implies b\cdot \log_a(x) \end{array} ~\hspace{7em} \begin{array}{llll} \textit{logarithm of factors} \\\\ \log_a(xy)\implies \log_a(x)+\log_a(y) \end{array} \\\\[-0.35em] ~\dotfill[/tex]

[tex]2\log_5(5x^3)+\cfrac{1}{3}\log_5(x^2+6)\implies \log_5( ~~ (5x^3)^2 ~~ )+\log_5\left( ~~ (x^2+6)^{\frac{1}{3}} ~~ \right) \\\\\\ \log_5( ~~ 25x^6 ~~ )+\log_5\left( ~~ (x^2+6)^{\frac{1}{3}} ~~ \right)\implies \log_5\left( ~~ (25x^6)\sqrt[3]{(x^2+6)} ~~ \right)[/tex]

According to medical research, teenagers' need to sleep,  (0.60, 0.70, and 0.80) is higher than 0.50, so they are less likely to occur.

The value of g that is least likely to occur is 0.50.

The article in the school newspaper claims that 50% of the 1,200 students at the high school are not getting enough sleep,

which would mean that P = 0.50.

However, the sample of 50 students is likely to differ from the population of 1,200 students,

So it's possible that the proportion of students in the sample who do not get enough sleep is different from 0.50.

The other values of g (0.60, 0.70, and 0.80) are higher than 0.50, so they are less likely to occur.

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The probability that the inspector in-charge is convinced that the suspect is guilty given he/she has brown hair is 0.882.

P(C) = P(C∣G)P(G) + P(C∣Gc)P(Gc) = (1)(0.6)+(0.2)(0.4) = 0.68

Simply put, probability is the likelihood that something will occur. When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes. Statistics is the study of events that follow a probability distribution.

This is then used to update the inspector's belief in the suspect's guilt posterior to discovering that the suspect does have that characteristic.

P(G∣C) = (P(G)P(C∣G))/P(C)

=1(0.6)/0.68

=0.882

So the probability that the inspector in-charge is convinced that the suspect is guilty given he/she has brown hair is 0.882.

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The probability that the inspector in charge is convinced that the suspect is guilty given he/she has brown hair is 0.882.

P(C) = P(C∣G)P(G) + P(C∣Gc)P(Gc) = (1)(0.6)+(0.2)(0.4) = 0.68

Simply put, the probability is the likelihood that something will occur. When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes. Statistics is the study of events that follow a probability distribution.

This is then used to update the inspector's belief in the suspect's guilt posterior to discovering that the suspect does have that characteristic.

P(G∣C) = (P(G)P(C∣G))/P(C)

=1(0.6)/0.68

=0.882

So the probability that the inspector in charge is convinced that the suspect is guilty given he/she has brown hair is 0.882.

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The square root of 7 belongs to the set of irrational numbers and the set of real numbers. Option B is correct.

In mathematics, a rational number is a number that can be described as the result of a fraction of value or does not have face value.

The square root of 7 is an irrational number because it cannot be expressed as a finite decimal or a fraction. Irrational numbers are a subset of real numbers, which is a set that includes all the real numbers, including both rational and irrational numbers.

Option B) "irrational and real numbers" is the correct answer.

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There are a few recursive formulas that can be used to calculate the nth term based on the pattern of the given data. For n 2, they are the nth term of the mathematical progression a = a - 1 + d. Geometric Progression nth term a = a - 1 r for n > 2.

Given that each phrase, an, goes back to the term before it, an1, the formula an=2an1+3 is recursive. According to this equation, the term we are looking for is equal to the previous term multiplied by two and then added to three. 4,11,25 make up the first three terms in this chain.

Almost identical to reading one, writing recursive functions:

A recursive sequence, also called a recurrence sequence, is a series of numbers that are indexed by integers and produced by solving a recurrence equation.

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The proportion of the area in each tail is 0.025, or 2.5%. This means that 2.5% of the area of the normal distribution lies in each of the two tails.

The total area of the normal distribution is 1.

The area of the left tail is 0.3413.

The area of the right tail is 0.3413.

Therefore, the proportion of the area in each tail is 0.341.

The normal distribution is a symmetric probability distribution that has a single peak and two tails extending outwards from the peak. The proportion of the area in each tail of the normal distribution is 0.025, or 2.5%. This proportion is the same for both tails and is determined by the fact that the normal distribution is symmetric. This means that 2.5% of the area of the normal distribution lies in each of the two tails. This area can be calculated by multiplying the total area of the normal distribution by 0.025. The total area of the normal distribution is equal to 1, and so the area in each tail is equal to 0.025. This proportion is constant regardless of the mean and standard deviation of the normal distribution. The proportion of the area in each tail of the normal distribution is an important concept in statistics, as it is used to calculate probabilities of certain events occurring.

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The complete question is

What proportion of the area is in each tail of a normal distribution with mean 0 and standard deviation 1? Enter your answer to 3 decimal places.