20. Let A = {-1, 1, 2, 4} and B = {1, 2} and define relations Rand S from A to B as follows: For every (x, y) E AXB, xRy |x) = \y| and x Sy x-y is even. State explicitly which ordered pairs are in A XB, R, S, RUS, and RnS.

Answers

Answer 1

AxB is the set of all ordered pairs (x,y) where x belongs to A and y belongs to B.

So, AxB = {(-1,1), (-1,2), (1,1), (1,2), (2,1), (2,2), (4,1), (4,2)}

R is a relation from A to B such that for every (x,y) E AxB, xRy |x| = |y|. So, we have:

-1R1, -1R2, 1R1, 2R2, 4R1

S is a relation from A to B such that for every (x,y) E AxB, xSy x-y is even. So, we have:

(-1,1), (1,1), (2,2), (4,2)

RUS is the union of relations R and S. So, RUS consists of those ordered pairs which either belong to R or to S. Hence, we have:

(-1,1), (-1,2), (1,1), 1,2), (2,1), (2,2), (4,1), (4,2)

RnS is the intersection of relations R and S. So, RnS consists of those ordered pairs which belong to both R and S. Hence, we have:

(1,1)

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Related Questions

When you test to configuration, you find that you can communicate with other computers on the same network, but you can't communicate with computers on other networks or the Internet. What is the most likely problem

Answers

The most likely problem is that the default gateway is not configured correctly.

The default gateway is the device that connects your local network to other networks, such as the Internet.

If the default gateway is not set or is set to an incorrect IP address, your computer won't know where to send traffic destined for other networks.

To fix this issue, you need to ensure that the default gateway is properly configured.

This can be done by accessing the network settings of your computer and checking the default gateway IP address.

It should be the IP address of your router or the device that connects your network to the Internet.

If the default gateway is already correctly configured, there might be other issues such as a firewall blocking the communication or incorrect routing settings.

In such cases, it is advisable to seek assistance from a network administrator or IT support.

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In the human digestive system, which mechanism is responsible for cutting and grinding food?

A) organ

B) stomach

C) teeth

D)
intestines

Answers

Answer:

teeth

Explanation:

the mechanism is teeth









Which of the following is not a type of external data? a) Demographics b) Household c) Socioeconomic d) Promotion History Q8 Does a data warehouse? a) Improve data access b) Slow data access c) Makes

Answers

The answer to the first question is "d) Promotion History" as it is not typically categorized as a type of external data.  Regarding the second question, a data warehouse is designed to improve data access rather than slow it down

External data refers to information that is obtained from sources outside of an organization. It provides valuable insights into external factors that can influence business operations and decision-making. The options provided in the question are all types of external data, except for "d) Promotion History." While demographic data, household data, and socioeconomic data are commonly used to understand consumer behavior, market trends, and target audience characteristics, promotion history typically falls under internal data. Promotion history refers to the records and data related to past promotional activities, campaigns, and strategies employed by the organization itself.

Moving on to the second question, a data warehouse is a centralized repository that is specifically designed to improve data access. It is a large-scale storage system that integrates data from various sources, such as transactional databases, spreadsheets, and external data feeds. The purpose of a data warehouse is to provide a structured and optimized environment for data storage, organization, and retrieval. By consolidating data into a single location, a data warehouse facilitates efficient access to information for analysis, reporting, and decision-making. It eliminates the need to query multiple systems and allows for faster and more streamlined data retrieval and analysis processes. Therefore, the correct answer to the question is "a) Improve data access."

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in the context of the f test, when a study has only one independent variable with two groups, the value of f equals

Answers

In the context of the f test, when a study has only one independent variable with two groups, the value of f equals the ratio of the variance between the two groups to the variance within the two groups. This value is used to determine whether there is a significant difference between the means of the two groups.

How to determine the significant difference?

1. Calculate the variance between the groups (also called "between-group variance") by comparing the means of the two groups and their overall mean.

2. Calculate the variance within the groups (also called "within-group variance") by comparing the individual scores in each group to their respective group means.

3. Divide the between-group variance by the within-group variance to obtain the F value.

In summary, for a study with only one independent variable and two groups, the value of F equals the ratio of between-group variance to within-group variance.

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Klout was hyped as a platform that could track online influence but became inactive. Why?.

Answers

Scalzi, in his CNN Money column, makes a witty remark about Klout practically sucking in data from all social media platforms and "throwing it into an algorithmic pot."

As a result, Peter Hess, Khoros's then-CEO, sent out a message indicating that Klout had finally lost its Klout.

How did Klout went down?

Even though some people took Klout seriously, Andrew Hutchinson writes for a social media website that its critics saw it as "a vanity metric - and like all vanity metrics, it can be gamed, it can be cheated, and thus it's rendered largely useless" .

Lithium Technologies confirmed earlier rumors that it had purchased Klout for about $200 million in March 2014. For businesses to create online communities, Lithium offered the necessary tools. After it combined with Spredfast (a company that specializes in social media marketing, community management, and software), it ceased to exist as a separate entity and was renamed Khoros LLC.

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What is the pencil tool in photoshop

Answers

Answer:

I think its to draw on the photo.

Explanation:

Answer:

draw

Explanation:

it opens the drawing menu

Andy is designing an app that he plans to post only in apple’s app store. He doesn’t plan on posting the app to any other app store. What development tool will he most likely use?

Answers

Based on the information provided, if Andy plans to post his app only in Apple's App Store, the development tool he will most likely use is Xcode.

Xcode is the official integrated development environment (IDE) for iOS app development. It provides all the necessary tools and resources to create, test, and submit apps specifically for Apple's ecosystem.

Xcode supports the programming languages Objective-C and Swift, which are used to write apps for iOS, macOS, watchOS, and tvOS. With Xcode, Andy can develop his app using Apple's official frameworks, APIs, and tools, ensuring compatibility and optimal performance on Apple devices.

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Do know who is in my dp?​

Answers

Answer:

wut dat mean i dont understand

Explanation:

Answer:

Interested.... :-):-):-):-):-):-)

What type of person has the necessary skills to research effectively using online resources?

A.
Someone who is functionally capable.

B.
Someone who is physically able.

C.
Someone who is correctly informed.

D.
Someone who is digitally literate.

Answers

Answer:

D

Explanation:

To be able to use online resources effectively, you have to be digital literate so as to know how to use technology to your benefit. You can have a technological tool in your hand which has the potential to turn your life around for good but if you don't know how to use it, what impact will it be able to make? In this digital day and age, it is only the digitally literate that will be able to move forward in life.

Hope it helped :)

Someone who is digitally literate is a type of person that has the necessary skills to research effectively using online resources. The correct option is D.

What is online resource?

Someone who is digitally literate is more likely to have the skills needed to conduct effective research using online resources.

Being digitally literate means having the skills, knowledge, and experience to effectively and efficiently use digital technologies.

This includes the ability to navigate and search the internet, assess the reliability and credibility of online sources, and use online tools and resources effectively for research and learning.

While functional and physical ability are important for using digital technologies, they do not always imply digital literacy.

Correct information is also important, but without the necessary digital literacy skills, it is insufficient to ensure effective online research.

Thus, the correct option is D.

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Consider the practice of outsourcing programmers, a common practice in many U.S. businesses. Think about how this practice is used to solve business problems and changes the way people build and manage organizations. Discuss the benefits and drawbacks of hiring foreign freelancers. Your answer should examine the issue from the perspective of what is good (or bad) for the business performing the outsourcing, the countries and workers who are hired as remote workers, and the U.S. economy overall. You should include at least one benefit and one drawback in your answer.

Answers

The practice of outsourcing programmers is known to be the act of  sharing or delegating as well as handing over control of programming and its associated tasks to any form of  external service provider that is said to be very good in that field and has the power and capabilities to handle the technical and operational areas of a programming project.

What is outsourcing and why is it always practiced?

Outsourcing is known to  be a kind of a business practice that entails the act of hiring a party that is known to be outside a company to carry out services or make goods that are said to be traditionally carried out in-house.

Note that The practice of outsourcing programmers is known to be the act of  sharing or delegating as well as handing over control of programming and its associated tasks to any form of  external service provider that is said to be very good in that field and has the power and capabilities to handle the technical and operational areas of a programming project.

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xml documents that conform to an xml schema are validated against that schema.

Answers

XML documents that conform to an XML schema are indeed validated against that schema to ensure their adherence to the defined structure and rules.

XML schema validation is a process where an XML document is checked against a specified XML schema to ensure its conformity. An XML schema defines the structure, data types, and constraints for the elements and attributes within an XML document. By validating an XML document against its corresponding schema, any inconsistencies or errors in the document's structure or content can be identified. This validation process helps ensure data integrity and interoperability by verifying that the XML document follows the expected format and adheres to the defined rules and constraints specified in the schema.

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give the difference between functional and functional tools in the middle of to the circle give importance​

Answers

Answer:

hakkuna matata is the radious of a circle

Recent photos you captured are low in quality. What is one of the first things to check? ​
A)batteries
B)lens cap
C)resolution
D)distance

Answers

One of the first things to check when your recent photos are low in quality is the C) resolution. Ensuring your camera is set to the proper resolution will help improve the image quality.

Resolution refers to the level of detail and clarity in an image and is primarily determined by the number of pixels in the image. A higher resolution image contains more pixels, resulting in a sharper and more detailed photograph. When the resolution is low, the image may appear pixelated, blurry, or lacking in detail.

To check the resolution of the captured photos, one can review the camera settings or examine the properties of the image files. It is essential to ensure that the camera is set to capture images at an appropriate resolution for the desired output or purpose. If the resolution is set too low, the resulting photos may not meet the desired quality standards.

Other factors such as lighting conditions, camera settings, and lens quality can also impact the overall image quality. However, considering that the question specifically asks for one of the first things to check, resolution becomes a primary consideration as it directly affects the level of detail and clarity in the photos.

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When you check the spelling in a document, one of the options is to add unrecognized words to the dictionary. If you were working for a large company, what types of words do you think you would add to your dictionary?

Answers

Answer:

Spelling dictionary

Explanation:

The spelling errors are common in the scientific scripts menu. There has been used a large number of non-stoppable common words that create problem in the scripts spelling error.

Some of the jargon is very difficult in the English dictionary and most of the words seem identical and very difficult but still used in manuscripts.

The easiest way to check these errors is to add the words in the dictionary. From that option, that word would be correctly spelled out.

6. Before cleaning your electronics, you should turn off the power to the device.
True
False

Answers

Answer:

True

Explanation:

If you leave the device on while cleaning, you risk electrocution.

Answer:

true to prevent damage or a nasty shock, you need to turn off power to your machine. For computers, you should power down and then unplug the device. You'll also want to unplug the individual monitors. Unplug laptops and remove their batteries if your model allows for this to be done. Explanation:

What are some more websites that are like Brainly?

Answers

Quizlet works just as well but definitely not better than brainly.

Hope you get everything you need

Consider the following incomplete code segment, which is intended to increase the value of each digit in a String by one. For example, if num is 12345, then the resulting String would be 23456.

String num = "12345";
int counter = 0;
String result = "";
while(/* Missing Loop Header */)
{
int newNum = Integer.valueOf(num.substring(counter,counter+1));
result+= (newNum + 1);
counter++;
}
System.out.println(result);

Which of the following should replace /* Missing Loop Header */ so that the code segment works as intended?

counter < num.length() - 1


counter <= num.length()


counter < num.length()


counter > num.length()


counter < num.indexOf(counter)

Answers

The instruction that should replace /* Missing Loop Header */ so that the code segment works as intended is (c)  counter < num.length()

Loops

The program is an illustration of loops (the while loop)

While loops are program statements that are used to perform repeated operations

For the string to return 23456, the while loop body must be repeated as long the counter is less than the length of the string num

Hence, the missing loop header is counter < num.length()

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Mention five(5) businesses that needs computer to apperate.

Answers

Answer:

1. Accounting

2. software developing

3. Website designing

4. Online transaction

5. Advertising

Need answer ASAP

In which phrase does software coding and testing happen in the spiral model?

The spiral model does not have a separate testing phase. Both software coding and testing occurs during the _____ phase.

Answers

both software coding and testing occurs during Engineering phase


Does Blackboard Ultra have an APP that you can download to keep up with your assignments?

Answers

Answer:yes!! ofc it is w=vec Judy 9_9n9+99m

Explanation:

How can you force a certain order of operations in a formula?
answer choices
By using simple formulas
They cannot be forced
By using parentheses
By positioning the operations from left to right

Answers

To change the evaluation order, enclose the part of the formula that must be calculated first in parenthesis.

What exactly are parentheses in an Excel formula?

If you want to change the order of an operation, use parentheses (). When you use parentheses, Excel is forced to calculate the values contained within the parentheses before calculating the rest of the formula. All operations enclosed in parentheses or brackets are solved first. Come second to solve any exponents. Third, the order in which we always multiply and divide is from left to right. Fourth, we work our way through each addition and subtraction problem from left to right.

Simple formulas typically begin with the equal sign (=), followed by numerical constants and calculation operators such as the plus (+), minus (-), asterisk (*), or forward slash (/). As an example, consider the following formula. When you combine multiple operations and functions into a single formula, Excel follows a predetermined order of operations.

Therefore the correct answer is By using parentheses .

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An accountant initially records adjusting entries in a(n) _____.
A. revenue record
B. ledger
C. expense record
D. Journal​

Answers

Journal!
Adjusting entries are changes to journal entries you've already recorded.

Answer:

Ledger

Explanation:

Believe me it's not a journal

Which tool can effectively increase the curl of the subject’s lips?

Answers

Blur tool can effectively increase the curl of the subject’s lips in photoshop.

What is blur tool?

You can paint a blur effect using the Blur Tool. By reducing the contrast between the pixels it affects, the Blur Tool's strokes blur the pixels' appearance.

All pertinent options for the Blur filter are displayed in the context-sensitive Options Bar, which is typically at the top of your workspace.

You can change the size and firmness of the brush using the brush option. The softness or featheriness of the brush's edges depends on how hard it is. Stronger in the center and weaker toward the edges, a soft blur brush will change pixels to varying degrees. It will create a stroke that melds well with the adjacent pixels.

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ATM machines respond to request in__________​

Answers

Answer:

Atm machine respond to request in atm card

ATM machines respond to requests in ATM card.

What is an ATM Machine?

ATM simply known as Automated Teller Machine is an electronic machine used by financial institutions to perform financial transactions. It is an automated banking operation which does not require the effort of man.

ATM card is a payment card that is issued by a financial institution which enables a customer to access their financial accounts through the automated teller machine (ATM) and other point of purchase transactions.

Hence, the ATM card gives commands to the ATM machine.

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Why should you always name directory files using lowercase letters?

Answers

Answer: Using all-lowercase filenames rather simplifies things here. If you somehow make the directory available to a Windows system, it will not be able to access both files. It will probably be able to access only the one that appears first in the directory, regardless of which name you use

Explanation:

Consider the following recursive algorithm: (a) Prove that Algorithm Weirdsort correctly sorts the elements in the array A. 2 (b) Ignoring ceilings (i.e. we can assume that n is a power of 3 ), write the recurrence in terms of n describing how many calls are made to Weirdsort with an initial call of Weirdsort (A[0…n−1]) ? Hint: write a recurrence whose general form is R(n)= aR(n/b)+f(n) where a,b are rational numbers and f(n) is a function of n. Justify why your recurrence is counting the number of recursive calls. (c) Using this recurrence, prove that R(n) is at most n 3
when n≥2 using induction.

Answers

(a) To prove that Algorithm Weirdsort correctly sorts the elements in the array A, we need to show two things: (1) it terminates and (2) it produces a sorted array. For termination, the algorithm works by repeatedly dividing the array into three equal-sized subarrays and recursively calling itself on each subarray. 1.termination is guaranteed. To show that the algorithm produces a sorted array, we need to prove the correctness of the recursive calls. Let's assume that the Weirdsort algorithm works correctly for arrays of size less than n. Then, we can say that for any array of size n, the algorithm will correctly sort it by recursively sorting the subarrays.



(b)  R(n) = 3R(n/3) + f(n) In this recurrence relation, n represents the size of the array and R(n) represents the number of recursive calls made to Weirdsort. The term 3R(n/3) accounts for the three recursive calls made on the three subarrays of size n/3 each. The term f(n) represents any additional operations or calls made outside of the recursive calls.
The recurrence relation accurately counts the number of recursive calls because for each recursive call, the size of the array is divided by 3. The initial call is made on an array of size n, and subsequent calls are made on subarrays of size n/3, n/9, n/27, and so on, until the base case of size 1 is reached.

(c) To prove that R(n) is at most n^3 when n≥2 using induction, we need to show two things: (1) the base case and (2) the inductive step. Base case: For n=2, we have R(2) = 3R(2/3) + f(2). Since n=2, the size of the array is reduced to 2/3 in the recursive call. Therefore, R(2/3) is the number of recursive calls made on an array of size 2/3. Since n<2, the base case holds. Inductive step: Assume that R(k) ≤ k^3 for all k.

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What force would a scale in an elevator on earth exert on a 53-kg person standing on it during the following situations?.

Answers

You can weigh yourself on a scale inside an elevator. Your mass is unaffected is happening to you or around you, but gravitational pulls you downward swiftly.

What occurs if a scale is placed in an elevator?

You and your scale move forward at the same rate as the elevator when it begins to ascend. You and the scale are propelled higher by the elevator floor. This implies that in order to push you and your weight up, the scale must exert more pressure on the individual.

What force does an elevator scale measure?

According to Newton's third rule, the scale will measure the force you exert on it, which is equal to the normal force acting on you. That is accurate for the elevator passenger's free body diagram.

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Suppose myfunction is defined as follows. How many calls to myfunction result, including the first call, when myfunction(9) is executed? int myfunction(int n){if (n <= 2){return 1;}return n * myfunction(n - 1);}

Answers

At this point, n <= 2, so the function will not make any further recursive calls and will simply return 1.

In total, there were 8 calls to my function, including the initial call with my function(9).

To find out how many calls to my function result when my function(9) is executed, we can analyze the function definition and trace the recursive calls.
The function is called with the argument 9: my function(9)
Since 9 > 2, we go to the return statement, which calls myfunction with the argument 8: myfunction(8)
Similarly, my function(8) will call my function(7)
my function(7) will call my function(6)
my function(6) will call my function(5)
my function(5) will call my function(4)
my function(4) will call my function(3)
my function(3) will call my function(2).

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2 WAp to input the radius and print
the area of circle

Answers

Program:-

\(\tt r=float(input("Enter\:the\:value\:for\:radius\:of\:circle"))\)

\(\tt x=3.14*\:r**2\)

\(\tt print("Area\:of\:Circle=\{x\}")\)

Sample run:-

\(\tt r=3\)

\(\tt Area\:of\:the\:circle=28.26\)

why is video game addiction a real problem?​

Answers

Video game addiction is a real problem because it starts interfering with school and other activies such as spending time with family, or being active. It slowly starts taking away your motivation to do anything else and all you want to do is play the game

Well, truthfully there is no such thing as video game addiction.

You see, playing video games is fun, and sure, sometimes some kids (or adults sometimes too) like to play for a lot longer than others would like them to, however, video gaming is a very good thing in many cases. You see, for example, there are gamers who have made a very large impact on the definition of success. Like Jaden Ashman (he was born in the UK) who won the Fortnite World Cup, and signed a contract with the Fortnite team Lazarus. This made Jaden earn over $60,000 a year. Parents and other people may believe that kids can be addicted to video games, but there have always been the people who prove them wrong. We as people get our own assumptions of what is or isn't addicting, video games among them, but we (the younger generation of gamers) know more insight than those others. People just need to re-define the definition of addiction.

Hope this helps and have a nice day.

-R3TR0 Z3R0

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Human infants go through an attachment period. john bowlby calls this a _________ period, meaning that for optimal development attachment should occur during this period. What kind of history you should study which of the following critical thinking errors is likely to occur among the subordinates if a leader is unethical? The temperature range in a pond in which all three-fish species could grow and survive is most likely a.2C to 8Cb. 22C to 28Cc. 12C to 18Cd. 32C to 38C As a boss, knowing your employees personality types can help you Prepare the adjusting journal entries for the following transactions. a. Supplies for office use were purchased during the year for $500, of which $100 remained on hand (unused) at year-end. b. Interest of $250 on a note receivable was earned at year-end, although collection of the interest is not due until the following year. c. At year-end, salaries and wages payable of $3,600 had not been recorded or paid. d. At year-end, one-half of a $2,000 advertising project had been completed for a client, but nothing had been billed or collected. e. Redeemed a gift card for $600 of services. The statement "If a = 6, then 6 = a." illustrates which property? What is the value of C? 14 = -2c - 6 -3c PLEASE HELP AS SOON AS POSSIBLE !! Need help id appreciate it consider the best way to respond to nadia. how effective is it to request to push back the deadline for your project? Please help me determine if these sequence are arithmetic geometric or neither 1. Ayon sa nakalistang katangian ng isang taongmalikhain, maituturing mo ba ang iyong sarili namalikhain? Ipaliwanag? which of the following is not considered a source for vitamin c: a salmon. b grapefruit juice. c orange juice. d cauliflower. Si la leyenda es cierta, King tut tena una parte posterior delgada de la cabeza? Whats the correct answer answer asap for brainlist use the ratio test to determine whether the series is convergent or divergent. [infinity] (1)^n1 (9^n / 5^n n^3)n = 1 identify an Why do they make good neighbors in this question they refer to? promiscuous mode is a special mode that a network card can be switched to that will allow the card to observe all traffic that passes by on the network.T/F Modern homo sapiens have a skull structure lacking in earlier hominins. What is that structure?.