A recent study of 50 U.S. chess players details such things as the number of years the players have been active and the chess ratings of the players. (A chess rating is a number from 100 to about 3000, with a higher number indicating greater expertise.) The chess rating data for the sample of 50 players are summarized in the following histogram: Frequency 15 15 - 13 U 10+ 7 7 5- 4 4 OHA 300 700 1900 2300 2700 1100 1500 Chess rating Based on the histogram, find the proportion of chess ratings in the sample that are less than 1500. Write your answer as a decimal, and do not round your answer.

Answer:

he

Step-by-step explanation:

he

       SAS - We have two sides (the small lines indicate this) and the angles across from each other (vertical angles) are congruent. This means the triangles are proven congruent by the SAS Congruence Postulate.

       Knowing this, we can say that AAS and ASA also apply, but as it is not known until we have SAS, I believe SAS is the only "correct" answer.

(HL does not apply here as we do not have right-triangles)

Have a nice day! :)

Answer: The total change in yards for the two plays can be found by adding the yardage gained or lost on each play. In this case, the team lost 14 yards on the first play and then lost another 7 yards on the next play.

To find the total change in yards, we can add the yardage gained or lost on each play:

Total change = -14 yards - 7 yards

Simplifying this expression, we get:

Total change = -21 yards

Therefore, the integer that represents the total change in yards for the two plays is -21.

Step-by-step explanation:

Answer:

I can help

Step-by-step explanation:

In economics, the SRAS curve represents the short-run aggregate supply, which depicts the relationship between the price level and the quantity of output supplied in the short run. There are two versions of the SRAS curve: one with flexible prices and one with sticky prices. The Hayekian Triangle is a graphical representation of the interplay between time, capital, and production in an economy.

AA decrease in patience, within the context of the Hayekian Triangle, implies a shift in time preferences and can have implications for resource allocation.

In economics, the SRAS curve illustrates the short-run aggregate supply, which shows the relationship between the overall price level and the quantity of output supplied in the short run. The SRAS curve with flexible prices is upward sloping, indicating that as prices rise, firms are willing and able to produce more output due to higher profitability. On the other hand, the SRAS curve with sticky prices is relatively flat, indicating that firms are unable or unwilling to adjust prices immediately in response to changes in demand or production costs. This stickiness can be caused by factors such as contracts, menu costs, or market imperfections.
The Hayekian Triangle, named after economist Friedrich Hayek, is a graphical representation of the interplay between time, capital, and production in an economy. It illustrates the trade-offs and decisions made by individuals and businesses based on their time preferences and the availability of capital goods. The triangle consists of three vertices: time, consumption goods, and production goods. It represents the process of using time and capital goods to transform resources into consumption goods.
A decrease in patience, within the context of the Hayekian Triangle, implies a shift in time preferences. When individuals and businesses become less patient, they place greater emphasis on immediate consumption rather than saving or investing in production goods. This shift in time preferences can have implications for resource allocation. If there is a decrease in patience, it may lead to reduced savings and investment, resulting in a lower capital stock and potentially lower future productivity and economic growth. It highlights the importance of balancing present consumption with future-oriented investments to maintain sustainable economic development.

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Answer:

yes

Step-by-step explanation:

as long as one input does not have two different outputs it is a function

Answer:

-14 x -4

Step-by-step explanation:

i did the quiz lol

Answer:

A

Step-by-step explanation:

took the quiz, hope this helps.

Given an AR(1) process with drift X = α + βX_{t-1} + ε_t, where α = 2, β = 0.7, and ε_t ~ N(0, 1).To find the mean of the process, we note that the AR(1) process has a mean of μ = α / (1 - β).

So, the mean is 6.67, the variance is 5.41, the first three ACF are 0.68, 0.326, and 0.161, and the first three PACF are 0.7, -0.131, and 0.003.

So, substituting α = 2 and β = 0.7,

we have:μ = α / (1 - β)

= 2 / (1 - 0.7)

= 6.67

To find the variance, we note that the AR(1) process has a variance of σ^2 = (1 / (1 - β^2)).

So, substituting β = 0.7,

we have:σ^2 = (1 / (1 - β^2))

= (1 / (1 - 0.7^2))

= 5.41

To find the first three autocorrelation functions (ACF) and the first 3 partial autocorrelation functions (PACF), we can use the formulas:ρ(k) = β^kρ(1)and

ϕ(k) = β^k for k ≥ 1 and

ρ(0) = 1andϕ(0) = 1

To find the first three ACF, we can substitute k = 1, k = 2, and k = 3 into the formula:

ρ(k) = β^kρ(1) and use the fact that

ρ(1) = β / (1 - β^2).

So, we have:ρ(1) = β / (1 - β^2)

= 0.68ρ(2) = β^2ρ(1)

= (0.7)^2(0.68) = 0.326ρ(3)

= β^3ρ(1) = (0.7)^3(0.68)

= 0.161

To find the first three PACF, we can use the Durbin-Levinson algorithm: ϕ(1) = β = 0.7

ϕ(2) = (ρ(2) - ϕ(1)ρ(1)) / (1 - ϕ(1)^2)

= (0.326 - 0.7(0.68)) / (1 - 0.7^2) = -0.131

ϕ(3) = (ρ(3) - ϕ(1)ρ(2) - ϕ(2)ρ(1)) / (1 - ϕ(1)^2 - ϕ(2)^2)

= (0.161 - 0.7(0.326) - (-0.131)(0.68)) / (1 - 0.7^2 - (-0.131)^2) = 0.003

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Answer:

B. 7−10; 11−14; 15−18; 19−22

Step-by-step explanation:

The opposite side of the right triangle (x) is approximately 6.888 inches long.

To solve this problem, we can use the trigonometric ratio for the sine function, which is opposite/hypotenuse. We have the hypotenuse as 12 inches and the opposite angle as 35 degrees, so we can set up the equation:

sin(35) = opposite/12

To solve for the opposite, we can multiply both sides by 12:

opposite = 12 * sin(35)

sin(35) as approximately 0.574:

opposite = 12 * 0.574

opposite ≈ 6.888

Therefore, the opposite side of the right triangle (x) is approximately 6.888 inches long.

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Should be 40ft. If not, I dearly apologize.

Answer:

40ft tall

Step-by-step explanation:

Hope this helps :)

Answer:

im not sure but i think 66

Step-by-step explanation:

The best measure of variability for the data is the range because the distribution is scattered.What is the range?The range of data is defined as the difference between the maximum value and the minimum value

. The list of weights is given below:8.7.5, 7.6, 3, 74, 7.9, 81,2,7.7The minimum value in the list is 3, and the maximum value in the list is 81. So, the drange is calculate as follows:Range = Maximum value – Minimum value= 81 – 3= 78The distribution is scattered because the range is relatively large.    

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To define a default field value in a form or a database, you can use the attribute "default". When you add the "default" attribute to a field, it will automatically assign the specified value to that field if no other value is provided by the user or system.

This can be particularly useful when designing forms or databases that require certain fields to have a value even when the user does not provide one.
For example, in a web form, you might have a "Country" field that requires users to select their country from a dropdown list. By setting a default value for this field, such as "United States," the system ensures that there is always a value associated with that field even if the user does not make a selection.
Similarly, in a database schema, you might have a "DateCreated" field that automatically assigns the current date and time as the default value. This ensures that the date and time are always recorded for each new entry, even if the user does not manually input a value.
In both cases, the "default" attribute allows you to streamline the data collection process and ensure that your forms and databases maintain consistent and complete data. Using default values can also improve the user experience by reducing the amount of input required, making it easier for users to complete forms and submit their data.

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Answer:

x=40

Step-by-step explanation:

Looking at this problem, we can see that 3x+9=129

Subtract 9 on both sides:

3x=120

Divide by 3 on both sides:

x=40

Answer:

8 hours

Step-by-step explanation:

Given that:

Money spent by Jacqueline to rent a bicycle = $33.50

Per hour charges for the bicycle for renting the bicycle = $4

Processing fee charged for renting the bicycle = $1.50

To find:

The number of hours, \(x\) for which Jacqueline rented the bicycle.

Solution:

Charges for 1 hour = $4

Charges for \(x\) hours = $\(4x\)

Processing fee = $1.50

Total fee charged for renting the bicycle is nothing but the sum of processing fee and the charges for \(x\) hours charged by the bike rental facility.

Total money spent = Processing Fee + Charges for \(x\) hours

Total money spent = 1.50 + 4\(x\) = 33.50

\(\Rightarrow 4x = 32\\\Rightarrow x = \bold{8\ hours}\)

So, Jacqueline rented the bicycle for 8 hours.

Answer:

x = 5760

Step-by-step explanation:

8 to 16: multiply by 2

16 to 48: multiply by 3

48 to 192: multiply by 4

192 to 960: multiply by 5

960 to x : multiply 960 by 6

Answer:

the answer is 5760

Step-by-step explanation:

8x2=16

16x3=48

48x4=192

192x5=960

960x6=5760

To fill in each blank so that the values are in order from smallest to largest, we have;

4° , 1⁴ = 4, 2² , 3³ , 4³ , 2⁹

We need to know that index forms are defined as mathematical forms used to represent numbers or variables that are too large or too small in more convenient forms.

These index forms are also known as scientific notation or standard forms.

Some examples of index forms are;

3²

4³

2³

From the information given, we have that;

To arrange the numbers;

4° = 1

1⁴ = 4

2² = 4

3³ = 27

4³ = 64

2⁹ = 512

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Using the graph given:

1. 1. Initial height of plane A: 4 miles.

2. Plane B was 1 mile.

3. The time both planes fly at exactly the same height is: 20 seconds.

A graph illustrates the relationship between two variables, one plotted on the x-axis upon which the one plotted on the y-axis depends on.

Like in the graph shown above, the time in seconds is plotted on the x-axis as against the height in miles on the y-axis.

Each point on the graph, (x, y) shows the height (y) of the plane after some seconds (x).

Therefore:

1. The initial height of plane A is at 4 miles.

2. After 40 secs, the height of plane B was 1 mile.

3. The point where the two lines intersect shows when the time and height of both planes are the same. Therefore, at 20 seconds, both planes were flying at the same height of 3 miles.

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The centralizers for the elements of z/z4 are \({0} \rightarrow z/z4, {1, 2} \rightarrow {0, 2}, {3} \rightarrow z/z4.\) The centralizers for the elements of d6 are \({r, r3} \rightarrow {r, r3}, {r2} \rightarrow {r2, r3}, {s} \rightarrow {s, r2}, {sr} \rightarrow {sr, r2}, {sr2} \rightarrow {sr2, r2}.\)

1. To find the centralizer of an element in a group, we need to find all elements in the group that commute with the given element. Let's consider the two groups z/z4 and d6.

z/z4: This is the group of integers modulo 4, which has four elements: {0, 1, 2, 3}. Let's consider each element in turn.

For 0, the centralizer is the whole group, since every element commutes with 0.

For 1, the centralizer is {0, 2}, since 0 and 2 commute with 1.

For 2, the centralizer is {0, 2}, since 0 and 2 commute with 2.

For 3, the centralizer is the whole group, since every element commutes with 3.

So the centralizers for the elements of z/z4 are: \({0} \rightarrow z/z4, {1, 2} \rightarrow {0, 2}, {3} \rightarrow z/z4.\)

2. d6: This is the dihedral group of order 12, which has six elements: {r, r2, r3, s, sr, sr2}. Let's consider each element in turn.

For r, the centralizer is {r, r3}, since only rotations by multiples of 120 degrees commute with r.

For r2, the centralizer is {r2, r3}, since only rotations by multiples of 60 degrees commute with r2.

For r3, the centralizer is {r, r3}, since only rotations by multiples of 120 degrees commute with r3.

For s, the centralizer is {s, r2}, since only reflections and rotations by multiples of 180 degrees commute with s.

For sr, the centralizer is {sr, r2}, since only reflections and rotations by multiples of 60 degrees commute with sr.

For sr2, the centralizer is {sr2, r2}, since only reflections and rotations by multiples of 300 degrees commute with sr2.

So the centralizers for the elements of d6 are: \({r, r3} \rightarrow {r, r3}, {r2} \rightarrow {r2, r3}, {s} \rightarrow {s, r2}, {sr} \rightarrow {sr, r2}, {sr2} \rightarrow {sr2, r2}.\)

In summary, the centralizer of an element in a group consists of all elements in the group that commute with that element. The centralizers for the elements of z/z4 and d6 have been found by considering each element in turn and finding the elements that commute with it.

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Answer:

To solve the equation 4a + 3 = 5a - 4, we want to isolate the variable "a" on one side of the equation.

First, we can simplify both sides of the equation by combining like terms:

4a + 3 = 5a - 4

Subtract 4a from both sides:

4a - 4a + 3 = 5a - 4a - 4

Simplify:

3 = a - 4

Next, we can add 4 to both sides of the equation to isolate "a" on one side:

3 + 4 = a - 4 + 4

Simplify:

7 = a

Therefore, the solution is a = 7

If two expressions have the same coefficients of the variable, then the variable can be any number

For the first choice

3(3r + 3) = 9r + 9 === 1st expression

6r + 6 ===== 2nd expression

If we equate them

9r + 9 = 6r + 6

If we solve the equation we will find just one value of r

9r + 9 - 6r = 6r - 6r + 6

3r + 9 = 6

3r + 9 - 9 = 6 - 9

3r = -3

r = -1

But in the other choices, the two expressions have the same coefficients of r

Then when we equate them they will cancel each other

Then r can be any value

Because it does not affect the equation

The image of (-1,7) after a reflection over the line y = x is (7, -1).

What is a line of reflection?

When reflecting a figure in a line or a point, the image and preimage coincide. A reflection converts each point in a figure from a point to an image via a set line. The reflection line is the name given to the fixed line.

Here, we have

Image : (-1.7)

Now,

Reflect over the line y = x:

When reflecting a point across the line y = x, the x-coordinate, and y-coordinate change places.

Thus, the point (-1,7) maps to the point (7,-1) when reflected over y=x.

Hence, The image of (-1,7) after a reflection over the line y = x is (7, -1).

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Answer:

\(x=0\)

Step-by-step explanation:

Given the following question:

\(-5 - 3(x - 8) = -5x + 19\)

To find the answer expand the equation, add/subtract on both sides, and simplify the expression.

\(-5 - 3(x - 8) = -5x + 19\)
\(-5-3(x-8)=-3x+19\)
\(-3x+19=-5x+19\)
\(19-19=0\)
\(19-19=0\)
\(-3x=-5x\)
\(-3x+5x=-5x+5x\)
\(-3x+5x=2x\)
\(2x=0\)
\(2x\div2=x\)
\(0\div2=0\)
\(x=0\)

Your answer is "x = 0."

Hope this helps.

Answer:

x<-2

Step-by-step explanation:

17+4x<9

4x<-8

x<-2

The solution is:

Work/explanation:

Recall that the process for solving an inequality is the same as the process for solving an equation (a linear equation in one variable).

Make sure that all constants are on the right:

\(\bf{4x < 9-17}\)

\(\bf{4x < -8}\)

Divide each side by 4:

\(\bf{x < -2}\)

Answer:

it is a function and domain and range is 0 to infinity

I'll remember some concepts:

\(\log_{a}{b} = \log_{a}{c} \implies b=c\\\\\log_{a}{b}+ \log_{a}{c} = \log_{a}{b\cdot c}\)

Question:

\(\log_{6}{(x^2-5x)}=\log_{6}{(2x-9)}+\log_{6}({x+3)}\\\\\\\log_{6}{(x^2-5x)}=\log_{6}{(2x-9)\cdot(x+3)}\\\\\\(x^2-5x) = (2x-9)\cdot(x+3)\\\\\\x^2-5x=2x^2+6x-9x-27\\\\\\0 = x^2+2x-27\\\\\\\Delta = 4+108 = 112\\\\\\\\\sqrt{\Delta} = \sqrt{112} = 4\sqrt{7}\\\\\\\\x = \dfrac{-2\pm 4\sqrt{7}}{2}\\\\\\\\x = -1 \pm 2\sqrt{7} \\\\\\\\x_1 = 2\sqrt{7} -1\\\\\\x_2 = -1-2\sqrt{7}\)

The negative solution cant exist since we are talking about logarithms.

Answer:

12 stamps

Step-by-step explanation:

6 divided by 0.50 = 12

Answer: it’s 12

Step-by-step explanation: all I did was multiplied 6 by .50

Hope this helps!

Answer:

1.-3

2.4

3.3

4. -4

5. -4

6.3

7. -19/9

8. -3

9.0

10. -2

Step-by-step explanation:

Answer:

188

Step-by-step explanation:

f(x)=4x² - 10+2

f(-7) = 4x² - 10 + 2

= 4(-7)² - 10 + 2

= 4 (49) - 10 + 2

= 196 - 10 + 2

= 188