Answer:
omnichannel retailing
Explanation:
Omnichannel retailing is the most sophisticated form of retailing whereby consumers are offered a consistent, uninterrupted and seamless experience when they want to purchase a product.
Retailing is the art of taking wholesale products and selling to the consumers in units. This retail method is a generic form of multi-channel retailing. It employs a simple cross-channel process whereby the users have better experience with the products. It is mostly used in the sale of phones, laptops and other electronic gadgets.Jessica recently started looking to upgrade her computer and has decided that she wants to use her current motherboard and purchase new RAM for her computer. She has done all the research and has determined that her motherboard can hold 16GB of RAM and has four slots. She has two DDR3 DIMM modules that are labeled 1600 MHz. When she goes to the website to purchase them, she does not find 1600 MHz modules, only PC ratings for modules. What RAM should Jessica purchase so that she can use a quad channel on her motherboard?
Answer:
PC3 12800
Explanation:
The RAM which should Jessica purchase so that she can use a quad channel on her motherboard is the PC3 12800 because it supports 1600 MHz modules while the other RAMs such as PC4 24000, PC3 1600 and PC3 10600 does not support 1600 MHz modules so that's why Jessica shouldn't purchase any of these RAMs and prefer PC3 12800 over the others.
PC3 12800 is recommended as she has a motherboard can hold 16GB of RAM and has four slots. Moreover She also has two DDR3 DIMM modules that are labeled 1600 MHz.
Some early computers protected the operating system by placing it in a memory partition that could not be modified by either the user job or the operating system itself. Describe two difficulties that you think could arise with such a scheme.
Here are two difficulties that I think could arise with a scheme that protects the operating system by placing it in a memory partition that could not be modified by either the user job or the operating system itself.
What's the issue about?The operating system would be difficult to update. Any changes to the operating system would require the entire operating system to be copied to a new memory partition. This could be a time-consuming and error-prone process.
The operating system would be vulnerable to hardware failures. If the memory partition containing the operating system were to fail, the entire operating system would be unavailable. This could cause a major disruption to the system.
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Placing the operating system in a non-modifiable memory partition poses two main challenges: difficulty in applying software updates and complications in system recovery. Both of these issues stem from the inability to modify the protected partition.
Early computers sometimes placed the operating system in a non-modifiable memory partition to protect it from being altered by user jobs or the operating system itself. This approach has notable difficulties:
Software Updates: By placing the OS in a memory partition that cannot be modified, applying updates or patches to address vulnerabilities becomes extremely difficult. This can render the system vulnerable to new threats as patching bugs or upgrading the OS requires access to modify the partition, which is restricted.System Recovery: In the event of an OS malfunction or corruption, restoring the system becomes challenging since the OS partition cannot be modified or rewritten. This may require physical intervention to replace the memory hardware or specialized tools to bypass the protection, leading to longer downtimes and more complex recovery processes.These issues underline the balance modern operating systems must maintain between protecting their integrity and ensuring they remain flexible enough for updates and recovery.
You wish to use a file system that creates a record or log of to-be-committed changes in the system so that if the system crashes mid-change, it can recover gracefully. To do this, you will need to make use of a(n) ___________ file system.
Answer:
Journaling file system
Explanation:
A "file system" allows the control of data storage and retrieval.
The "Journaling file system" is a type of file system that records the to-be committed changes in the computer. This can track both of the data stored and the related metadata. This kind of data structure is then referred to as a "journal." So, this means that if the system crashes or a power failure happens, there is a lesser chance for the file system to be corrupted. It can also recover gracefully or even more quickly.
So, this explains the answer.
Final answer:
The correct answer is "journaling"To ensure data integrity and facilitate recovery from crashes, a journaling file system is required. It maintains a log of changes to be applied, allowing for graceful recovery. Additionally, version control is a related technology that manages file changes over time, useful for collaborative projects.
Explanation:
You wish to use a file system that logs changes before they're permanently committed to storage to ensure data integrity and provide a way to recover in case of a system crash. For this requirement, a journaling file system is the ideal solution. Journaling file systems such as EXT3, EXT4, and NTFS, keep a record of changes in a dedicated space known as a journal before they are applied to the main file system. In the event of a system failure during a write operation, the system can consult this journal to determine what changes were in progress at the time of the crash and apply them correctly, preventing data corruption.
Beyond journaling at the file system level, another related concept is version control, which is more specifically focused on managing changes to files over time, particularly for code and document collaboration. Popular version control systems include SVN (Subversion) and CVS (Concurrent Versions System). While a journaling file system protects against data loss from system crashes, version control systems provide a detailed record of edits, changes, and contributions over time, facilitating collaborative work and historical tracking of file changes.
Both journaling file systems and version control systems are essential tools in ensuring data integrity, recovery, and collaborative efficiency in computing environments.
The __________ stage of the data science process helps in exploring and determining patterns from data.
Answer:
Data Explorations
Explanation:
The stages of a data science project can be summarized into the following
Step 1: Figure out the problem
Step 2: Data collection
Step 3: Process the data for analysis (Cleaning the data)
Step 4: Explore the data (Exploratory Analysis)
Step 5: Perform in-depth analysis
Step 6: Communicate Results
For this question, step 4 is the correct stage for the discovery of hidden patterns in the data. The activities in this stage are basically:
Inspection of data inline with some specific propertiesComputing some descriptive statisticsvisualize the data to observe significant featuresAccording to the text, the judicious use of elements such as bullets, numbers, boldface, italics, and capitalization in documents can be particularly useful in _____. framing proof-reading avoiding cliches facilitating interactivity providing visual variety and emphasizing key information
Answer:
Facilitating interactivity.
Providing visual variety.
Emphasizing key information.
Explanation:
The judicious use of these elements helps the author in various different ways. These characters facilitate the interaction of the reader with the text by making it easier for him to understand the best way to proceed with the reading. Moreover, they provide visual variety, which makes information easier to process for the reader. Finally, these characters also emphasize key information, helping with reading comprehension.
In older systems, often the user interface mainly consisted of ____-control screens that allowed a user to send commands to the system. Question 1 options: physical process input command
Answer:
Process
Explanation:
In older systems, the user interface mainly consisted of process-control screens that allowed a user to send commands to the system. These systems were used in a great variety of industries, and it gave the user control over process measurements or process variables. It also allowed the user to view the current state of the process, modify the operation of the process, and perform other related actions.
You are a help desk technician providing support for a wireless network. A user calls and complains he cannot access the Internet. The user tells you he has good signal strength, but the network connection states "acquiring network address" and the IP address is all zeros. What could cause this problem?
Answer:
From the user explanations, it can be inferred that the issue may be as a result of incorrect security parameters such as Wireless Protected Access (WPA) which ensure security for wireless connections.
Explanation:
If there is an incorrect access pass to the wireless network by the WPA, any wireless user will not be able to complete a Layer 2 connection to the wireless network after connecting and getting good signal indication and would thus be unable to obtain IP address automatically to be able to log on to browse the internet from the DHCP Server.
Answer:
Incorrect connectivity configurations.
Explanation:
In many instances, the connectivity configurations may not be matching. This results in a loss in internet connectivity. Thus, the first thing will be to check the wireless area connections settings or simply the LAN settings. In addition, the local host or server can also check their systems to see if there are no generation problems on their side. Sometimes it may happen that external factors beyond the customer control can hinder the connectivity issues.
Design a program that lets the user enter the total rainfall for each of 12 months into a list. The program should calculate and display the total rainfall for the year, the average monthly rainfall, and the months with the highest and lowest amounts.
Answer:
import java.util.Arrays;
import java.util.Scanner;
public class num12 {
public static void main(String[] args) {
double [] rainfall = new double[12];
Scanner in = new Scanner(System.in);
System.out.println("Enter the rainfall for the first month");
rainfall[0]= in.nextDouble();
for(int i=1; i<rainfall.length-1; i++){
System.out.println("Enter rainfall for the next month");
rainfall[i]= in.nextDouble();
}
System.out.println("Enter the rainfall for the last month");
rainfall[11]=in.nextDouble();
System.out.println(Arrays.toString(rainfall));
int totalRainfall = 0;
for(int i=0; i<rainfall.length; i++){
totalRainfall += rainfall[i];
}
System.out.println("Total Rainfall is "+totalRainfall);
System.out.println("The Average Monthly Rainfall is "+(totalRainfall/12));
double minRain = rainfall[1];
int monthLowest =0;
for(int i =0; i<rainfall.length; i++){
if(minRain>rainfall[i]){
minRain = rainfall[i];
monthLowest =i;
}
}
System.out.println("The Minimum Rainfall is: "+minRain+ " In the "+(monthLowest+1) +" Month");
double maxRain = rainfall[1];
int monthHighest =0;
for(int i =0; i<rainfall.length; i++){
if(maxRain<rainfall[i]){
maxRain = rainfall[i];
monthHighest =i;
}
}
System.out.println("The Maximum Rainfall is: "+maxRain+" In the "+(monthHighest+1)+" Month");
}
}
Explanation:
Using Java programming Language
An Array is created to hold the list of total monthly rainfall.Scanner is used to prompt user to enter the monthly rainfallUsing a for loop the user is prompted to repetitively enter rainfall for each monthThe list is displayed using Java's Arrays.toString MethodThe total rainfall is created by adding elements at index 0-11 using a for loopThe montly average is calculated by dividing total rainfall by 12 totalRainfall/12Using a combination of for loops and if statements and creating variables for Min and Max rainfall we determine the maximum and minimum months of rainfall and output them
After a partition on a hard disk is formatted with a filesystem, all partitions on that hard disk drive must use the same filesystem. True or False? True False
Answer:
False
Explanation:
A hard disk partition is a defined storage space or a separate data space on a hard drive. Most operating systems in recent times allow users to split a hard disk into multiple partitions, making one physical hard disk into numerous smaller logical hard disks space with each not affecting the other.
After any hard disk formatting process is carried out, a fresh partition process that won't involve using the same file system can still be done.
dLucy is planning to launch her podcast on career guidance for college students and has already recorded a few videos for marketing purposes. Which of the following apps can she use to mix and match the clips?
a. FilmoraGo
b. Google photos
c. Adobe Premiere Clid. Audacity
Answer:
A. FilmoraGo; C. Adobe Premiere
Explanation:
Many video editing software exists out there, but their function is pretty much the same. They edit, mix and customize clips to create beautiful multimedia content for different purposes (advertisements, podcasts, movies, comedy clips, etc.). This software used are different as some may contain more functions and setting than the other.
Let us take a brief dive into the options:
FilmoraGo: is a video editing software that runs on Andriod and iOS. It contains many effects and it is pretty basic to use and understand.Google Photos: Created by Google, helps to organize your photo albums and stores them for you.Adobe Premiere: is also a video editing software, it was first launched in 2003 and has since evolved to contain more sophisticated video editing tools.Audacity: is an audio editor available for Windows, Mac OS, and Linux. This software is completely free and open source.
Hence, dLucy can use the FilmoraGo or the Adobe Premiere to edit her video clips.
Lucy needs an application that can be used to mix her recorded videos. With Adobe Premiere application, she can mix her videos.
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The computer system provides an internal clock that sends an interrupt periodically to the CPU signaling that it’s time to start processing another program or thread. The time between interrupt pulses is known as a:_______.
Answer:
The time between interrupt pulses is known as quantum.
Explanation:
In the computer architecture, there is an internal clock which synchronizes and keep tracks of all the processes going around the computer. This internal clock regularly send interrupts to the CPU. These interrupts signals alert the CPU that there are some events that needs attention so that the processing of new programs or threads can happen in a timely manner. The amount of time it takes between these interrupt signals is known as quantum.
A cooler with heat pipes, which contain a small amount of liquid that becomes a vapor when heated, allowing heat to be drawn away from the CPU without the use of a fan is known by what two terms?
Answer:Passive CPU cooler
Fanless CPU cooler
Explanation:
A Passive CPU Cooler is a CPU cooler with only a heatsink. It has no fans and is completely silent in operation. Passive CPU Cooler is also called Fanless CPU Cooler or Noiseless CPU Cooler.
This fanless CPU cooler uses IcePipe technology - no fans, no dust, no noise. It is capable of silently cooling any processor with a TDP (thermal design power) output of up to 95 watts, including all Ivy Bridge CPUs. ... IcePipe directly connected onto heatpipe for maximum thermal conductivity.
Daniel joined an outdoor activities club. He has begun to purchase many books about kayaking and rafting. Borders bookstore sends him email promotions focusing on outdoor activities. This is an example of ______ segmentation based on his lifestyle.
Answer:
Psychographic Segmentation
Explanation:
Psychographic Segmentation is a technique used in grouping or determining a market segment based on personality traits, beliefs, lifestyle choices, interest and other factors. It is a technique used in market Segmentation to determine target customers using psychological traits of individuals lifestyle that determines consumption habits. In this case, because Daniel joined an outdoor activities club and began to purchase books concerning outdoors, borders bookstore uses it as an opportunity to send promotions focusing on outdoor activities influenced by Daniel's lifestyle.
A short-circuit evaluation is where each part of an expression is evaluated only as far as necessary to determine whether the entire expression is:_____.A. True B. false
Answer:
A. True
Explanation:
Characteristics of a short - circuit:
C. C++, Java uses short circuit evaluation of logical expressions involving && and ||.Short - circuit evaluation exposes the potential problem of side effects in expressions, e.g.(a > b) || (b++ / 3).
Ada: programmer can specify either (short - circuit is specified with and then and or else).If the executives for Office Max LLC, a chain of office supply stores, developed the chain's objectives by asking buyers and store managers to forecast sales and merchandise for the next year, and then transmitted those estimates up the organization to the top level, it would be an example of _____ planning.
Answer:
It would be an example of bottom-up planning
Explanation:
Bottom-Up Planning is a method of planning that defines objectives and ways to achieve them through the bottom up. It relatively narrows goals that are initially set at the lower levels of the organizational hierarchy. First, relatively close targets at lower levels of the organizational hierarchy are set. They are then gradually integrated into the framework of global goals and global strategy at higher and higher levels. It is therefore a convergent approach.
With bottom-up planning, you give your project deeper focus because you have a larger number of employees involved in the project, each with their own area of expertise. Team members work side-by-side and have input during each stage of the process. Plans are developed at the lowest levels and are then passed on to each next higher level. It then reaches senior management for approval.
Mila received a new DVD player that she is trying to connect to the back of her television by feel alone. The first stage of memorizing how to make the connection would be through ____.
Answer:
The options for this question are the following:
a. iconic sensory memory
b. haptic sensory memory
c. short-term memory
d. long-term memory
The correct answer is b. haptic sensory memory.
Explanation:
Haptic memory has a capacity of 4 or 5 items, such as the iconic one, although the footprint is maintained for a longer time, about 8 seconds in this case. This type of sensory memory allows us to examine objects by touch and interact with them, for example to pick them up or move them properly.
It is believed that there are two subsystems that make up the haptic memory. On the one hand we find the cutaneous system, which detects the stimulation of the skin, and on the other the proprioceptive or kinesthetic, related to muscles, tendons and joints. It is appropriate to distinguish proprioception from interoception, which involves internal organs.
Haptic memory has been defined more recently than iconic and echoic, so that the scientific evidence available around this type of sensory memory is more limited than those that exist on the other two we have described.
Haptic memory depends on the somatosensory cortex, especially on regions located in the upper parietal lobe, which store tactile information. Likewise, the prefrontal cortex, fundamental for movement planning, also seems involved in this function.
The prediction that the number of transistors on a chip would double about every two years is known as ________. Metcalfe's law Megan's law Moore's law Murphy's law Ashby's law
Answer:
Moore's law
Explanation:
The Moore’s law which was named after the pioneer, Gordon Moore, predicted that the number of transistors on a chip would double about every two years. This law is one of the reasons why computers became so powerful. These transistors and chips are used to make mathematical calculations and in 1965, Gordon made an observation and forecasted that the number of transistors that can be placed in any ICs doubles approximately every two years. Moore was so convinced about this prediction that he went on to co-found the biggest chips processor; INTEL. This trend has been accurate since then but has started to slow down from 2013.
Falcon Security can obtain the computing resources it needs from Amazon, including servers, operating systems, and a DBMS. If Falcon Security uses this option, it is utilizing the ________ services.
Answer:
The correct answer to the given question is "PaaS" .
Explanation:
The full form of PaaS is Platform as a service sometimes it is also known as an application platform as a service. The Platform as a service is under cloud computing. The Platform as a service is under the third-party vendors that provide the client hardware and software resources for developing the application.
With the help of PaaS(Platform as a service ) services, the falcon Security will access Amazon's computing tools like servers, operating systems and DBMS.
hich of the following is a disadvantage of online surveys? They result in high response bias They lead to higher cost per completed interview than other methods. They involve slow data acquisition. They are less convenient for using visual stimuli They require extensive coding after the data is collected.
Answer:
They result in high nonresponse bias.
Explanation:
The online survey seems to be a survey that can be answered by the intended community across the Web. Internet-based surveys become mainly done with such a database as Web types to preserve the responses as well as analytical tools that deliver analysis.
Although online survey is the examination of anything such as web, tool, software or any popular app, etc, by which they can get that how many and how many peoples using or like those things.
So the following are the reason that the other options are not true according to the given statement.
Yan wants to attract customers specifically searching on Google for Time-B-Gone, his company's unique office-support product. His marketing consultant suggests using Dynamic Search Ads, and knows Yan will need to start with a simple approach. For vendors like Yan, what’s the simplest method for using Dynamic Search Ads? A. Landing pages from standard ad groups.
B. Page feeds.
C. URL filtering.
D. Categories from dynamic search engines.
Answer:
The answer is "Option A".
Explanation:
The interactive background advertisements, that use advanced internet navigation technology from Google to dynamically resolve specific information demands based on the quality of a network page are also referred to as interactive search ads. This ads are good for tactics, and certain options were incorrect, that can be defined as follows:
In option B, It allows you easily access all other URLs of creative online ads. In option C, It helps regulate operation in a machine. In option D, It grows the internet traffic.The ______________ steps through the source code, converting each source code instruction into appropriate machine language following the strict rules of the language and writing the machine code to a separate file.
Answer:
Compiler
Explanation:
A compiler takes the source code thereby converting them to a machine language object file in which the linker combines this object file with other previously compiled object files in order to create file that are executable.
A compiler is also change or transform code that are typically written in a high-level programming language into the machine code.
Therefore The COMPILER steps through the source code, converting each source code instruction into appropriate machine language following the strict rules of the language and writing the machine code to a separate file.
Jack wants to store a large amount of data on his computer. He chooses to use a database for this purpose. What is a database? A database stores a large amount data in vertical and horizontal .
Answer:
1: Records
2: tables
Answer:Jack wants to store a large amount of data on his computer. He chooses to use a database for this purpose. What is a database? A database stores a large amount data in vertical Records and horizontal Tables.
Explanation:
What would be the value of bonus after the following statements are executed? int bonus, sales = 1250; if (sales > 1000) bonus = 100; if (sales > 750) bonus = 50; if (sales > 500) bonus = 25; else bonus = 0;
Answer:
100
Explanation:
The statement uses a several if statements to check the variable sales and determine the amount of bonus.
The first if statement assigns the the value of 100 to bonus if sales is greater than 1000. if (sales > 1000) bonus = 100;
Since sales has been assigned the value of 1250, sales = 1250; then this condition is true and the value of bonus becomes 100.
A ________ is when teachers develop a professional based network of people selected by him/her to pursue learning needs and share knowledge and experiences in technology use.
Answer:
Blog
Explanation:
A blog is when teachers develop a professional based network of people selected by him/her to pursue learning needs and share knowledge and experiences in technology use.
A class blog is a shared space, which gives the teacher and student ease of access to share and write ideas to the main area. It is basically used as a collaborative discussion space and can serve as an extra-curricular extension of the classroom.
What is workfare?
a program that requires work in exchange for assistance
welfare that is limited to preschool-age children
an early poverty program from the 1950s
a state-by-state grant program of aid to the elderly
You have just set up a new laser printer for the company president on her Windows workstation. You have installed the printer and the drivers. What should you do next?
Answer:
Edit the printer properties there after, configure the device-specific settings.
Explanation: This is done through the following procedure
Open Start ~Settings ~ Printers and Faxes.
Right click printer, select Printing Preferences.
Then change the settings.
Your manager has asked you to shift usage and consumption of technology resources from a local environment managed by in-house IT staff to the Internet. What kind of computing will allow you to accomplish her goal?
Answer:
Cloud Computing
Explanation:
Moving your technology usage from local in house us get out the internet means you're moving into cloud computing. What is cloud computing?
Simply put, cloud computing is the delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the Internet (“the cloud”) to offer faster innovation, flexible resources, and economies of scale.
You typically pay only for cloud services you use, helping lower your operating costs, run your infrastructure more efficiently and scale as your business needs change.
Cheers
Cloud computing is the type of computing that will allow you to shift usage and consumption of technology resources from a local environment to the Internet.
Explanation:If your manager wants to shift usage and consumption of technology resources from a local environment managed by in-house IT staff to the Internet, the type of computing that will allow you to accomplish this goal is cloud computing. Cloud computing involves storing and accessing data, applications, and services over the Internet rather than on local servers or personal computers. It allows for convenient and flexible access to resources from any device with an Internet connection.
java
Create a do-while loop that asks the user to enter two numbers. The numbers should be added and the sum displayed. The loop should ask the user whether he or she wishes to perform the operation again. If so, the loop should repeat; otherwise it should terminate
Sample Run1
Enter two numbers: 3 15
Do you want another operation: Yes
Enter two numbers: 45 56
Do you want another operation: No
Output1: Sum = 119
Sample Run2
Enter two numbers: 33 150
Do you want another operation: Yes
Enter two numbers: -56 56
Do you want another operation: Yes
Enter two numbers: 58 15
Do you want another operation: Yes
Enter two numbers: 123 87
Do you want another operation: No
Output2: Sum = 466
Answer:
import java.util.Scanner;
public class num3 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.print("Enter two numbers: ");
int num1 = in.nextInt();
int num2 = in.nextInt();
int sum = num1+num2;
System.out.print("Do you want another operation: ");
String ans = in.next();
while(ans.equalsIgnoreCase("yes")){
System.out.print("Enter two numbers:");
num1= in.nextInt();
num2 = in.nextInt();
System.out.println("Do you want another operation: ");
ans = in.next();
sum = sum+(num1+num2);
}
System.out.println("sum = "+sum);
}
}
Explanation:
In the program written in Java Programming language,
The scanner class is used to prompt and receive two numbers from the user which are stored as num1 and num2. Another variable sum is created to hold the sum of this numbers
Then the user is prompted to answer yes or no using Java's equal.IgnoreCase() method.
If the user enters yes, he/she is allowed to entered two more numbers that are countinually added to sum
If the user eventually enters a string that is not equal to yes. The loop terminates and the accumulated value of sum is printed.
The computer program that Josh is working on presents him with a sentence in which a word has been underlined. Josh has to indicate the part of speech represented by the underlined word. After receiving feedback about the correctness of his response, Josh is given another sentence with an underlined word. This description best illustrates what type of computer-based instruction (CBI) program?
Answer:
Drill and Practice
Explanation:
Drill and Practice is a type of Computer-based Instruction (CBI) program. In Drill and Practice, answered questions are given immediate feedback. These problems or exercises are structured and answered on the program to provide instant feedback to the person taking the test.
For instance, when going through an evaluation test but you are required to provide the correct answer before moving on. Once a question is answered, the program will indicate whether correct or wrong, if the question is correct, move to the next question but if wrong you start again. This is a typical example of Drill and practice.
This is exactly what is seen in our scenario in the question.
Two machines can finish a job in StartFraction 20 Over 9 EndFraction hours. Working alone, one machine would take one hour longer than the other to complete the same job. How long would it take the slower machine working alone to complete this job?
Answer
5 hours
Explanation
The two working together can finish a job in
[tex] \frac{20}{9} \: hours[/tex]
Also, working alone, one machine would take one hour longer than the other to complete the same job.
Let the slower machine working alone take x hours. Then the faster machine takes x-1 hours to complete the same task working alone.
Their combined rate in terms of x is
[tex] \frac{1}{x} + \frac{1}{x - 1} [/tex]
This should be equal to 20/9 hours.
[tex] \frac{1}{x} + \frac{1}{x - 1} = \frac{9}{20} [/tex]
Multiply through by;
[tex] 20x(x - 1) \times \frac{1}{x} +20x(x - 1) \times \frac{1}{x - 1} = 20x(x - 1) \times \frac{9}{0} [/tex]
[tex]20(x - 1) +20x = 9x(x - 1)[/tex]
[tex]20x - 20+20x = 9{x}^{2} - 9x[/tex]
[tex]9{x}^{2} - 9x - 20x - 20x + 20= 0[/tex]
[tex]9{x}^{2} - 49x + 20= 0[/tex]
Factor to get:
[tex](9x - 4)(x - 5) = 0[/tex]
[tex]x = \frac{4}{9} \: or \: x = 5[/tex]
It is not feasible for the slower machine to complete the work alone in 4/9 hours if the two will finish in 20/9 hours.
Therefore the slower finish in 5 hours.
The question can be solved by setting up a system of equations based on the machines' working rates and then solving for the time it takes the slower machine to complete the job on its own.
Explanation:To solve for the time it would take for the slower machine working alone to complete the job, we can set up a system of equations based on the rates of work for each machine.
Let x represent the time (in hours) it takes for the faster machine to complete the job working alone. Therefore, the slower machine would take x + 1 hours to complete the job alone. Since the two machines working together can finish the job in 20/9 hours, we can write the following equation based on the sum of their rates:
1/x + 1/(x+1) = 9/20
To solve for x, we need to find a common denominator and solve the resulting quadratic equation. Once we find the value of x, we then add 1 to find the time it would take for the slower machine working alone.