which of the following statements about the mean are true? check all that apply. it can be used for data that are measured on a nominal scale. it is algebraically defined (that is, there is an equation you can use to calculate its value). it is commonly referred to as the arithmetic average. it always corresponds to an actual score in the data.

The trapezoidal rule is a numerical integration method that frequently overestimates the real value of a function's definite integral.

The trapezoidal rule is a strategy for approximating the definite integral in calculus. The trapezoidal rule works by computing the area of the region under the graph of the function f(x) that is approximated as a trapezoid. The trapezoidal rule is commonly used to calculate the area under curves. This is achievable if the overall area is divided into smaller trapezoids rather than rectangles. The Trapezoidal Rule integration determines the area by approximating the area under a function's graph as a trapezoid. The midway rule uses rectangular areas to approximate the definite integral, whereas the trapezoidal rule uses trapezoidal approximations to approximate the definite integral. Simpson's approach works by first approximating the original function with piecewise quadratic functions.

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Answer:

w = 25

Step-by-step explanation:

8/5w = 40

Divided both sides by 8/5

w = 25

Let's check

8/5(25) = 40

40 = 40

So, w = 25 is the correct answer.

Answer: w = 25

Step-by-step explanation:

    To solve for w, we will isolate the variable by using inverse operations.

    Given:

[tex]\displaystyle \frac{8}{5} w=40[/tex]

    Divide both sides of the equation by [tex]\frac{8}{5}[/tex]:

* Note: w is being multiplied by [tex]\frac{8}{5}[/tex], so the inverse operation is division

[tex]\displaystyle w=\frac{40}{\frac{8}{5 } } \mapsto w=40*\frac{5}{8} \mapsto w=*\frac{40*5}{8} \mapsto\frac{200}{8} \mapsto \boxed{w=25}[/tex]

The condensed logarithm is given as follows:

log(cq^z).

The logarithmic expression for this problem is defined as follows:

log c + z log q

For the multiplication/power rule, we have that:

z log q = log q^z.

Hence the expression would be simplified as follows:

log c + q^z.

The addition of logarithms can also be represented as the logarithm of the product, hence the condensed logarithm is given as follows:

log c + q^z = log(cq^z).

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Answer:

The answer is D.

Step-by-step explanation:

Triangle ABC with a hypotenuse of 7 units and angle B equal to 70 degrees,

Since triangle ABC is a right triangle and angle B is 70 degrees, it can be deduced that angle C must be 90 - 70 = 20 degrees.

assuming

length of side AC  = a

length of side BC = b.

Using the Pythagorean theorem, we can find the values of a and b.

a^2 + b^2 = 7^2

a^2 = 7^2 - b^2

a = √(7^2 - b^2)

Using the tangent function

tan C = b/a

tan 20 = b/√(7^2 - b^2)

Solving for b, we get:

b = tan(20) * √(7^2 - b^2)

We can use numerical methods to find the approximate value of b. Using a calculator, we can find that b is approximately 4.7. Rounding to the nearest tenth, b is 4.7 units.

Finally, using the Pythagorean theorem again, we can find the value of a:

a^2 + b^2 = 7^2

a^2 = 7^2 - b^2 = 7^2 - 4.7^2

a = √(7^2 - 4.7^2)

a = √(7^2 - 22.09)

Using a calculator, we can find that a is approximately 5.3. Rounding to the nearest tenth, a is 5.3 units.

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The caramel topping demand curve will not change:

The cost of caramel topping is falling; there will be an increase in demand for caramel topping:

Butterscotch topping costs more money;

There will be less demand for caramel topping:

Ice cream now costs more money.

The quantity of caramel topping demanded would increase if the price of the topping dropped. Consequently, the demand curve for caramel topping would go lower.

Ice cream and caramel toppings are complementary products.

Products that are consumed together are said to be complementary.

The amount of ice cream demanded would drop if the price went up. There would be a drop in the number of caramel toppings needed as a result of the fall in demand.

a decline in the popularity of caramel toppings. With less demand, the demand curve for caramel toppings would move inward.

Butterscotch and caramel ice cream toppings serve as stand-ins.

Products that can be used in place of one another are known as substitute goods.

The quantity demanded for butterscotch topping would decline if the price of butterscotch topping rose, making it more expensive overall. Customers might switch to caramel topping. As a result, demand for caramel topping would rise and the demand curve would move outward.

Demand curve: what is it?

The demand curve is a graphical representation of how the cost of an item or service relates to how much is demanded over a given period of time.

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Chad will purchase 0.432 gallons of red and white paint.

The division is the process of repetitive subtraction. It is the inverse of the multiplication operation. It is defined as the act of forming equal groups.

Given

Dimension of the door = 18 feet by 6 feet

Area of the door = 108 square feet

1 gallon of paint covers 250 square feet

Let x gallon paint covers 108 square feet

Proportion of paint to area covered

1/250 = x/108

x = 108/250

x = 0.432

Hence, 0.432 gallons of red and white paint, Chad will purchase.

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Approximately 90.7% of measurements will be between 31.88 and 41.54.

To find the percentage of measurements that will be between 31.88 and 41.54, we need to use the standard deviation to find the number of standard deviations away from the mean that 31.88 and 41.54 are, and then use a standard normal table to find the corresponding proportion of data within that range.

First, we'll find the z-score for 31.88:

z = (31.88 - 36.71) / 3.22 = -1.49.

Similarly, the z-score for 41.54 is:

z = (41.54 - 36.71) / 3.22 = 1.34.

Now we can use a standard normal table to find the proportion of data between -1.49 and 1.34 standard deviations from the mean. This proportion is approximately 0.907, meaning that approximately 90.7% of measurements will be between 31.88 and 41.54.

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The numerical value of the standard deviation is never (B) less than the variance and is never negative.

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers.

While a high standard deviation suggests that the values are dispersed over a wider range, a low standard deviation suggests that the values tend to be close to the mean (also known as the anticipated value) of the collection.

The standard deviation's numerical value is always greater than the variance and can never be negative.

The lowercase Greek letter (sigma), for the population standard deviation, or the Latin symbol s, for the sample standard deviation, are most frequently used in mathematical texts and equations to indicate standard deviation.

Standard deviation may be written as SD.

Therefore, the numerical value of the standard deviation is never (B) less than the variance and is never negative.

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In light of the query we've got D)x + y ≤ -2 and 2x - 3y ≤ -9 is a pair of inequalities for (-3, 1) is the correct answer.

When resolving an inequality, you can do one of the following: · Add a same number to each side; • Subtract the same amount from each side; • Multiply or divide either aspect by the exact positive amount. You must flip the inequality sign if you combine or split each end by a negative number.

According to the values x = -3, y = 1

-3 + 1 = -2, which is less than or equal to -2, so the first inequality is true.

2 * -3 - 3 * 1 = -9, which is less than or equal to -9, so the second inequality is also true.

Since both inequalities are true, (-3, 1) is a solution for the system of inequalities x + y ≤ -2 and 2x - 3y ≤ -9.

we get ,

x + y ≤ -2

2x - 3y ≤ -9

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The Complete Question :

For which system of inequalities is (-3, 1) a solution?

A. x+y<-2 and 2x-3y <-9

B. x+y<-2 and 2x-3y <-9

C. x+y≤-2 and 2x-3y <-9

D. x+y≤-2 and 2x-3y ≤-9

All the zeroes of f(x) are, - 4, 3/2, - 5/3

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

We have to given that;

The function is,

⇒ f(x) = 9x³ + 45x² + 26x - 40

And,  (x + 4) is a factor of f(x).

Now, Divide the function as;

⇒ x + 4 ) 9x³ + 45x² + 26x - 40 ( 9x² + 9x - 10

             9x³  + 36x²

          -          -

       ------------------------

                    9x² + 26x

                    9x² + 36x

                 -         -

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

                            - 10x - 40

                            - 10x  - 40

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

                            0

Thus, All the factors of function f (x) is,

⇒ (x + 4) (9x² + 9x - 10)

⇒ (x + 4) (9x² + 15x - 6x - 10)

⇒ (x + 4) (3x(3x + 5) - 2(3x + 5))

⇒ (x + 4) (3x - 2) (3x + 5)

Thus, All the zeroes are,

⇒ x + 4 = 0 ⇒ x = - 4

⇒ 3x - 2 = 0 ⇒ x = 2/3

⇒ 3x + 5 = 0 ⇒ x = - 5/3

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Sampling distribution type distribution is simulated with the sample proportion with n = 15 and p = 0.65.

It is defined as a probability distribution of a statistic that is from a larger number of samples from a specific population.

We are given that

The probability of tails of a weighted coin, p=0.65 and n=15

We have to find the type of distribution that is simulated if this procedure is repeated 100 times.

The random variable is a proportion of a number of tails therefore, the type of distribution is the sampling distribution of the sample proportion.

Probability is something that is to happen.

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Answer: 816.4 [tex]ft^2[/tex]

Step-by-step explanation: The formula is A=2[tex]\pi[/tex]rh

Answer:

Step-by-step explanation:

1. Each point moves 3 times as far from the origin as it was.

2. Each point moves to 1/3 its previous distance from the origin.

3. Each point moves twice as far from (2, 2) as it was.

1. Each point moves 3 times as far from the - 1

Answer: The slope of the line is 3; option A is correct.

Step-by-step explanation:

La pieza de hierro pesó (2 + 2/8) libras más que la pieza de aluminio.

Para ver esto, debemos tomar la diferencia entre los pesos de las dos piezas de metal.

Sabemos que:

La diferencia entre esos valores nos dará:

(9 + 3/8) libras - (7 + 1/8) libras.

Podemos reagrupar los numeros como:

(9 - 7) libras + (3/8 - 1/8) libras

2 libras + 2/8 libras

(2 + 2/8) libras

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The percentage of the time will its value falls in the indicated region are (a) 68.54%, (b) 95.44%, (c) 95.99%, (d) 99.48%, (e) 5.54%, (f) 97.19%, and (g) 15.96%.

(a) The percentage of time that a variable with 10 degrees of freedom will fall between -1.81 and 1.81 is 68.54%.

(b) The percentage of the time that a variable with 10 degrees of freedom will fall between -3.17 and 3.17 is 95.44%.

(c) The percentage of the time that a variable with 24 degrees of freedom will fall between -2.06 and 2.06 is 95.99%.

(d) The percentage of the time that a variable with 24 degrees of freedom will fall between -3.75 and 3.75 is 99.48%.

(e) The percentage of the time that a variable with 23 degrees of freedom will fall outside the interval from -2.81 to 2.81 is 5.54%.

(f) The percentage of the time that a variable with 24 degrees of freedom will fall to the right of 2.80 is 97.19%.

(g) The percentage of the time that a variable with 10 degrees of freedom will fall to the left of -1.81 is 15.96%.

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--The given question is incomplete; the complete question is

"Given a variable that has a t distribution with the specified degrees of freedom, what percentage of the time will its value fall in the indicated region? (Round your answers to one decimal place.)

(a) 10 df, between -1.81 and 1.81

(b) 10 df, between -3.17 and 3.17

(c) 24 df, between -2.06 and 2.06

(d) 24 df, between -3.75 and 3.75

(e) 23 df, outside the interval from -2.81 to 2.81

(f) 24 df, to the right of 2.80

(g) 10 df, to the left of -1.81"--

It is referred to as "simple random sampling" when a sample of size n is taken from such a population of size N and any conceivable sample of that size has an equal likelihood of occuring.

A selection of participants from such a population are chosen at random by the researcher using simple random sampling, a sort of probability sampling.

Thus, it is referred to as "simple random sampling" when a sample of size n is taken from such a population of size N and any conceivable sample of that size has an equal likelihood of occuring.

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9.42 m and 3 m are the missing lengths. 30 degrees is the missing angle.

A triangle is a three-sided polygon that is sometimes (but not always) referred to as the trigon. Every triangle has three sides and three angles, which may or may not be the same. A triangle is a three-sided polygon with three edges and three vertices in geometry. The total of a triangle's interior angles equals 180 degrees, which is its most essential feature. This is known as the angle sum property of a triangle. This figure is two-dimensional and has three straight sides. A triangle is a three-sided polygon. A triangle's three angles added together equals 180°. A single plane contains the triangle.

Here,

sin 60=p/h

√3/2=p/6

p=3√3 m

cos 60=b/h

1/2=b/6

b=3 m

90+60+x=180

x=30 degrees

The missing lengths are 9.42 m and 3 m. The missing angle is 30 degrees.

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The value of the segment FE for the similar triangles is equal to 6.

The triangles EFG and ECD are similar, this implies that the length FE of the smaller triangle is similar to the length CE of the larger triangle

and the length FG of the smaller triangle is similar to the length CD of the larger triangle

so;

FE/12= 6/2FE

2(FE)² = 12 × 6 {cross multiplication}

2(FE)² = 72

(FE)² = 72/2

(FE)² = 36

FE = √36 {take square root of both sides}

FE = 6.

Therefore, the value of the segment FE for the similar triangles is equal to 6.

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Answer:

2x x 3y x 3x is 18x4y  hope it helps

Step-by-step explanation:

If Luis trains two times per week with 12-pound weights , then to improve his strength, he should (d) Increase to three times per week.

By Increasing the frequency of his strength training sessions from two times per week to three times per week can help Luis improve his strength by exposing his muscles to more stimulation and allowing for more adaptations to occur.

It is important to remember to progress gradually and listen to his body to avoid injury.

The option (d) ;  involves increasing the frequency of his strength training sessions from two times per week to three times per week. By exposing his muscles to more stimulation, he will be allowing for more adaptations to occur and potentially leading to greater strength gains.

The given question is incomplete , the complete question is

Luis strength trains two times per week. He uses 12-pound weights and performs three sets of eight repetitions. He wants to improve his frequency. What should he do?

(a) Increase to 10 repetitions.

(b) Increase to 15-pound weights.

(c) Increase to four sets.

(d) Increase to three times per week.

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Answer: The mean absolute deviation for the given data set is 19.

Step-by-step explanation:

The mean absolute deviation (MAD) is a measure of the variability of a set of data and is defined as the average of the absolute deviations of each data point from the mean. To find the MAD, we first need to find the mean of the data set, and then subtract each data point from the mean and take the absolute value of the result.

Here is the step-by-step process for finding the MAD for the given data set:

Find the mean of the data set: (108 + 53 + 47 + 22 + 56 + 62) / 6 = 56

Subtract the mean from each data point:

108 - 56 = 52

53 - 56 = -3

47 - 56 = -9

22 - 56 = -34

56 - 56 = 0

62 - 56 = 6

Take the absolute value of each result:

|52| = 52

|-3| = 3

|-9| = 9

|-34| = 34

|0| = 0

|6| = 6

Find the average of the absolute deviations: (52 + 3 + 9 + 34 + 0 + 6) / 6 = 19

So the mean absolute deviation for the given data set is 19.

Currently, Michael is 72 years old

Let's represent Michael's current age as "x".

Then Brandon's current age is x/3.

18 years ago, Michael's age was x-18

Brandon's age was x/3-18.

18 years ago, we can write the equation:

x - 18 = 9 * (x/3 - 18)

So, we have

x - 18 = 3x - 162

Evaluate the like terms

2x = 144

Divide by 2

x = 72

So, Michael is 72 years old now.

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Answer:

576 minutes

Step-by-step explanation:

You first must convert the time of a day into minutes.

24 hours x 60 minutes = 1440 minutes in a day.

Now you need to multiply the sum by 2/5

1440/1 x 2/5  =  2880/5
Simplify the number into a whole number.

2880 divided by 5 = 576

The number of cubes fitted in the storage box is 448.

The space occupied within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity.

Given:

Edge length of cube = 1/2 inch

So, volume of a cube = (Side)³

                                    = (1/2)³

                                    = (1/8)

Now, Volume of the storage box = 56 cubic inches.

So, number of cubes fitted in the storage box

= Volume of the storage box / volume of a cube

= 56/ (1/8)

= 56 x8

= 448 cubes

Hence, number of cubes fitted is 448.

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The distance between the airport and the point on the ground directtly below the plane is x=-4411.95221

A plane in geometry is a two-dimensional, flat surface. It has no thickness and never ends. An example of a geometric plane might be a sheet of paper or the surface of a wall. The term "plane figures" refers to the flat geometric shapes. In geometry, a plane is a surface made up of all the lines that are parallel to one another and connect any two locations on it. It is a level or flat surface, to put it another way. A plane is uniquely defined in any of the following ways in a Euclidean space of any number of dimensions: with the aid of three non-collinear points. A plane is a fictitious flat surface that passes through the body.

Based on the given,

Formulate:

[tex]tan8=\frac{30000}{x}[/tex]

Evaluate the equation/expression:

[tex]x=-4411.95221[/tex]

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Answer:

Hello!

a) Melody's average 4 year salary = (56,000 + 60,000 + 73,000 + 75,000) / 4

= 264,000 / 4

= 66,000

So, Melody's average 4 year salary is $66,000.

Step-by-step explanation:

Melody has worked for 30 years at Fancy Pet magazine and is planning to retire at the end of the year. As per her employer's pension formula, she will receive 2.5% of her average salary over the last four (4) years of employment for every year worked.

To calculate Melody's average salary over the last four years, we first need to add up her salary from the last four years: 56,000 + 60,000 + 73,000 + 75,000 = 264,000. Then, we divide this sum by 4 to find the average: 264,000 / 4 = 66,000.

Therefore, Melody's average 4 year salary is $66,000. With this information, we can calculate the amount of pension she will receive based on her years of employment and the pension formula offered by her employer.

The value of angle A is 100⁰.

option D is the correct answer.

The measure of angle A is calculated by applying the following formula as shown below;

If line AB is similar to line AC, then angle B must be equal to angle C.

∠ B = ∠ C = 40 ⁰

The value of angle A is calculated as follows;

∠ A = 180⁰ - ( ∠ B + ∠ C ) ( sum of angles in a triangle )

∠ A = 180⁰  -  ( 40⁰ + 40⁰ )

∠ A = 180⁰ - ( 80 ⁰ )

∠ A = 100⁰

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Each circle represents a number. The left side of the equation (4(x+5)) can be divided by 4 to find the value of x+5. The value of x is 4.70

The distance between a circle's center and periphery is referred as the radius. Always, the diameter is twice the radius. As a conclusion, the diameter is multiplied by two to obtain the formula.

The ratio of a circle's circumference to diameter serves as the basis for the traditional definition of Pi (). The diameter or length of such a circle is its circumference. A straight line connecting a point on one end of both the ring to a place on the opposite end, through the center, is the diameter.

Diameter = 2r -----------(1)

where r is the radius

The value of the diameter = 32 m   and  radius is given to be 4(x+5)

substitute the above into equation (1)   and then solve for x

32  =  2 [ 4(x + 5)]

first open the inner bracket

32 = 5[4x + 20}

then open the outer bracket

32 = 20x + 100

subtract 16 from both-side of the equation

20x=100-32

20x=68

x=3.4

Divide both-side of the equation by 3.4

16/3.4  = 8x/3.4

4.70 = x

x = 4.70

Therefore, the value of x is 4.70

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