Description
Simplify :
A. (-2)(-3)
B. (-2)(3)
C. (2)(-3)
D.(2)(3)
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.
Explanation & Answer
A=6
B=-6
C=-6
D=6
..............................................................................Completion Status:
100%
Review
Review
Anonymous
This is great! Exactly what I wanted.
Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4
24/7 Homework Help
Stuck on a homework question? Our verified tutors can answer all questions, from basic math to advanced rocket science!
Most Popular Content
References
Discussion: Multiple Regression
This Discussion assists in solidifying your understanding of statistical testing by engagi ...
References
Discussion: Multiple Regression
This Discussion assists in solidifying your understanding of statistical testing by engaging in some data analysis. This week you will work with a real, secondary dataset to construct a research question, estimate a multiple regression model, and interpret the results.
Whether in a scholarly or practitioner setting, good research and data analysis should have the benefit of peer feedback. For this Discussion, you will post your response to the hypothesis test, along with the results. Be sure and remember that the goal is to obtain constructive feedback to improve the research and its interpretation, so please view this as an opportunity to learn from one another.
To prepare for this Discussion:
Review this week’s Learning Resources and media program related to multiple regression.
Create a research question using the General Social Survey that can be answered by multiple regression.
Use SPSS to answer the research question. Post your response to the following:
What is your research question?
What is the null hypothesis for your question?
What research design would align with this question?
What dependent variable was used and how is it measured?
What independent variable is used and how is it measured?
What other variables were added to the multiple regression models as controls?
What is the justification for adding the variables?
If you found significance, what is the strength of the effect?
Explain your results for a lay audience, explain what the answer to your research question.
Be sure to support your Main Post and Response Post with reference to the week’s Learning Resources and other scholarly evidence in APA Style.
Respond to at least one of your colleagues’ posts and comment on the following:
Do you think the variables are appropriately used? Why or why not?
Does the addition of the control variables make sense to you? Why or why not?
Does the analysis answer the research question? Be sure and provide constructive and helpful comments for possible improvement.
If there was a significant effect, comments on the strength and its meaningfulness.
As a lay reader, were you able to understand the results and their implications? Why or why not?
Required Readings
Laureate Education (Producer). (2016g). Multiple regression [Video file]. Baltimore, MD: Author.
Frankfort-Nachmias, C., & Leon-Guerrero, A. (2018). Social statistics for a diverse society (8th ed.). Thousand Oaks, CA: Sage Publications. Chapter 12, “Regression and Correlation” (pp. 325-371) (previously read in Week 8)
Wagner, W. E. (2016). Using IBM® SPSS® statistics for research methods and social science statistics (6th ed.). Thousand Oaks, CA: Sage Publications. Chapter 11, “Editing Output” (previously read in Week 2, 3, 4, 5. 6, 7, and 8)
University of Maryland Global Campus Discussion Post
Attached are 4 discussion post. Basic honestly more of myths, and perspective. IT IS NOT ACTUAL MATH PROBLEMS.
I wil ...
University of Maryland Global Campus Discussion Post
Attached are 4 discussion post. Basic honestly more of myths, and perspective. IT IS NOT ACTUAL MATH PROBLEMS.
I will also place 2 classmate post for a response. Unable to post until I post my initial post. Please be aware I will also need responses to post
POST 1
If my learning path in ALEKS is any indication, transcription errors seem to be my biggest problem, followed by the occasional interpretation error. Several of my failures to clear a topic without providing an incorrect answer are the result of either typing/clicking the wrong number or symbol (a malfunctioning mouse isn’t helping) or seeing a word problem like one I’ve just completed and failing to catch one of the variables in the word problem was changed. You’d think by now I’d realize I won’t see the exact same problem twice! As a result, I’ve learned I need to double-check my entries before I hit submit, and make sure I pulled the right numbers out of a word problem.
Since starting this course, my confidence level has risen slightly. I attribute this in large part to ALEKS and how it approaches introducing topics. I find myself making it through probably 80-90% of the problem sets it throws at me without making any errors. The learning path and explanation buttons seem to be all I need in most cases - I’ve really only opened the textbook when doing the problem sets to see how my assigned problem lines up with the examples listed.
Classmates for response Week3:
Ryan
1. Agree or disagree with one of the Math Myths listed above. Find a link to one article on the Internet to support your response.
I agree with all of the myths listed except for myths 1 and 5. I do believe that the most important thing in math (as far as the U.S. education system appears to be concerned with) is getting the correct answer. In addition, I believe that math is a very logical and calculating field that often requires a keen analytical mindset. I do not agree with the statement that men are better than women at math in natural sense as this could be blamed on a societal construct versus anything from nature. For example, teachers often underestimate the ability of females to perform math functions, leading many of them to abandon the idea of pursuing a professional career in the field by the 8th grade (AAUW 2). While this is obviously a hot-take that is not true in the slightest, it is easy to see this being the case from a historical point of view. However, times have changed and this is no longer the case. Women have pursued careers in this field at a much higher rate; so much so that I can say that I’ve only had 1 or 2 male math teachers in my entire life versus dozens of female teachers. In addition, I am not above admitting that I am not that great at math and I am sure there are plenty of women within this class and outside of here that are much better at math than me. This statement, while dated and continuously evolving, is simply incorrect.
2. Share your own current or former feelings of math anxiety. Explain how you plan to deal with it in this course.
This is the first time I’ve heard this phrase before and I can genuinely say that I have a pretty rough case of math anxiety. When I first registered for classes at UMGC, I contacted my advisor and told her to tell me what the simplest math class is because I am “too stupid for anything else”. Part of that is just my sense of humor but another part of that is because I have always struggled with math and I was just saying how I felt albeit lightheartedly. Preparation is my key to getting through this anxiety; ensuring I stay ahead of the work and don’t have to rush through everything at a later date to avoid the feeling of being overwhelmed will help me avoid these thoughts. After all, I’ve made it this far by doing this and I can make it through this class by keeping this up.
Works Cited:
AAUW. The Myth of the Male Math Brain. American Association of University Women. No Date. https://www.aauw.org/resources/article/the-myth-of-the-male-math-brain/
Daniel
I'll address Math Myth #1: Aptitude for math is inborn. I disagree with the statement - to a point. However, there a certain stereotypes associated with math that have elements of truth which tie in to this myth. I recall listening to a podcast a couple years ago which broke down the "Asians are good at math" stereotype and why it often appears to be true. Perhaps the thing I found most intriguing was discussion of a Chinese language (I don't recall if it was Cantonese, Mandarin, or both) and how it is constructed in such a way that numbers can be communicated much more efficiently than in English. Rather than having weird linguistic constructs like "eleven, "twelve", "fourteen" and "thirty-seven", the Chinese language(s) use mono-syllabic words to say "one ten and one", "one ten and two", "one ten and four", and "three tens and seven". Additionally, aspects of culture play into approach to learning as well. So, aptitude for math isn't inborn, but some people are exposed to things at an early age and given tools that enable them to excel at math.
The article I found supports both points of view, and basically concludes that certain abilities related to mathematics, such as pattern recognition, may be inborn; however, crunching numbers isn't can't exist without numbers and a way to write and say them. dissenting viewpoint addresses precisely what I described in the previous paragraph.
Article Link: http://www.scienceclarified.com/dispute/Vol-2/Do-humans-have-an-innate-capacity-for-mathematics.html
Statistical Concepts for Research questions, assignment help
Statistical Concepts for Research questions*** Original answer *** Label and number each question followed by answer ...
Statistical Concepts for Research questions, assignment help
Statistical Concepts for Research questions*** Original answer *** Label and number each question followed by answer and cite sources below each answer PLS!!!!!1. Paul states that he scored in the 100th percentile on a given standardized test. Do you believe him? Why or why not? 200 word minimum2. Actuaries work with statistics and probabilities each day. What do actuaries do and what tests do they take?(200 word minimum)3. Find a video that provides help with learning probability. Why do you like it and what did you learn? Visit this helpful website (http://www.khanacademy.org/) to assist you with your search. ( provide video link plus 200 word minimum)4. Find a study where the distribution follows a normal or bell-shaped
curve. An example of a normal distribution or bell-shaped curve, called
“Heights of Red Pine Seedlings”, is located in the beginning of
Chapter 6 in the book. Cite the source of the study you’ve selected, and
explain why you think the distribution is bell shaped. For instance,
if the study is about income, then the income may be low for a child
and peak at age forty-five and then gradually drop.
PUG Forecasting Technique What Is Your Prediction Discussion
Topic: What is your Prediction?
A time series model is a forecasting technique that attempts to predict the future values ...
PUG Forecasting Technique What Is Your Prediction Discussion
Topic: What is your Prediction?
A time series model is a forecasting technique that attempts to predict the future values of a variable by using only historical data on that one variable. Here are some examples of variables you can use to forecast. You may use a different source other than the ones listed (be sure to reference the website). There are many other variables you can use, as long as you have values that are recorded at successive intervals of time.
Currency price: XE (http://www.xe.com/currencyconverter/)
GNP: Trading Economics (http://www.tradingeconomics.com/united-states/gross-national-product)
Average home sales: National Association of Realtors (http://www.realtor.org/topics/existing-home-sales)
College tuition: National Center for Education Statistics (https://nces.ed.gov/fastfacts/display.asp?id=76)
Weather temperature or precipitation: (http://www.weather.gov/help-past-weather)
Stock price: Yahoo Finance (https://finance.yahoo.com)
Main Post: Once you have historical data, address the following:
1. State the variable you are forecasting.
2. Collect data for any time horizon (daily, monthly, yearly). Select at least 8 data values.
3. Use the Time Series Forecasting Templates to forecast using moving average, weighted moving average, and exponential smoothing (see video in Unit 9 LiveBinder).
4. Copy/paste the results of each method into your post. Be sure to state the number of periods used in the moving average method, the weights used in the weighted moving average, and the value of ? used in exponential smoothing.
5. Clearly state the “next period” prediction for each method.
Florida National University Statistics in Health Care Paper
Students will critically analyze the readings from Chapter 3 and 4 in your textbook. This assignment is designed to help y ...
Florida National University Statistics in Health Care Paper
Students will critically analyze the readings from Chapter 3 and 4 in your textbook. This assignment is designed to help you review, critique, and apply the readings to your Health Care setting as well as become the foundation for all of your remaining assignments. You need to read the article (in the additional weekly reading resources localize in the Syllabus and also in the Lectures link) assigned for week 2 and develop a 2-3-page paper reflecting your understanding and ability to apply the readings to your Health Care Setting. Each paper must be typewritten with 12-point font and double-spaced with standard margins. Follow APA style 7th edition format when referring to the selected articles and include a reference page. EACH PAPER SHOULD INCLUDE THE FOLLOWING: 1. Introduction (25%) Provide a brief synopsis of the meaning (not a description) of each Chapter and articles you read, in your own words. 2. Your Critique (50%) What is your reaction to the content of the articles? What did you learn about Prevalence, Incidence and the relationships between them? What did you learn and how you can apply Ordinal and Categorical Variables? Did these Chapter and articles change your thoughts about comparing the extent of Disease between groups? If so, how? If not, what remained the same? 3. Conclusion (15%) Briefly summarize your thoughts & conclusion to your critique of the articles and Chapter you read.How did these articles and Chapters impact your thoughts on quantifying the extent of disease and summarizing Data Collected in the sample? Evaluation will be based on how clearly you respond to the above, in particular: a) The clarity with which you critique the articles; b) The depth, scope, and organization of your paper; and, c) Your conclusions, including a description of the impact of these articles and Chapters on any Health Care Setting.
15 pages
Ames Housing
For data cleaning of the AmesHousing dataset following rules were followed a. If any of the missing observations is greate ...
Ames Housing
For data cleaning of the AmesHousing dataset following rules were followed a. If any of the missing observations is greater than 90%, then we will ...
Similar Content
Middle Grade Mathematics Task
Please view the instructions and worksheet attached and complete with CORRECT ANSWERS! Of course do not plagiarize from an...
QNT 275T UOPX Wk 2 Standard Deviation and Variance Discussion
One thing to be careful of when calculating the variance is that you divide by N when calculating the variance for a popul...
Condense the logarithm as much as possible.ln 3x2+ln x−2ln x
Condense the logarithm as much as possible.ln 3x2+ln x−2ln x...
University College London Descriptive Statistical and Graphical Summaries
ALL STATISTICAL ANALYSIS SHOULD BE UNDERTAKEN USING SPSS.
A manufacturer of household cleaning products is interested in ...
How Many Strings Can Be Formed if We Allow Repetitions Variation of One of Your Values Exam
please be careful while you do the work the values are given on top. please consult with me before you start as well....
Algebra Question
Describe the translation from the graph of y = x2 if you are&n...
Vectors5 21
2. The area of a parallelogram is the length of the cross-product of its sizes. its length is √152 + 72 + 102 = √374. ...
Attachment 1 9 1
a. To find the derivative use the chain rule. Take the derivative of the outer function Use the quotient rule to find the...
Project 6.7 Normal Distribution
Curve has a hump in middle of the histogram and nearly symmetric around 129. It can be considered as a bell...
Related Tags
Book Guides
You Are a Badass
by Jen Sincero
Homo Deus
by Yuval Noah Harari
Salt To The Sea
by Ruta Sepetys
Dead Poets Society
by Nancy Horowitz Kleinbaum
The Two Towers
by J. R. R. Tolkien
The King Must Die
by Mary Renault
The Elegant Universe
by Brian Greene
Milkweed
by Jerry Spinelli
Frankenstein
by Mary Shelley
Get 24/7
Homework help
Our tutors provide high quality explanations & answers.
Post question
Most Popular Content
References
Discussion: Multiple Regression
This Discussion assists in solidifying your understanding of statistical testing by engagi ...
References
Discussion: Multiple Regression
This Discussion assists in solidifying your understanding of statistical testing by engaging in some data analysis. This week you will work with a real, secondary dataset to construct a research question, estimate a multiple regression model, and interpret the results.
Whether in a scholarly or practitioner setting, good research and data analysis should have the benefit of peer feedback. For this Discussion, you will post your response to the hypothesis test, along with the results. Be sure and remember that the goal is to obtain constructive feedback to improve the research and its interpretation, so please view this as an opportunity to learn from one another.
To prepare for this Discussion:
Review this week’s Learning Resources and media program related to multiple regression.
Create a research question using the General Social Survey that can be answered by multiple regression.
Use SPSS to answer the research question. Post your response to the following:
What is your research question?
What is the null hypothesis for your question?
What research design would align with this question?
What dependent variable was used and how is it measured?
What independent variable is used and how is it measured?
What other variables were added to the multiple regression models as controls?
What is the justification for adding the variables?
If you found significance, what is the strength of the effect?
Explain your results for a lay audience, explain what the answer to your research question.
Be sure to support your Main Post and Response Post with reference to the week’s Learning Resources and other scholarly evidence in APA Style.
Respond to at least one of your colleagues’ posts and comment on the following:
Do you think the variables are appropriately used? Why or why not?
Does the addition of the control variables make sense to you? Why or why not?
Does the analysis answer the research question? Be sure and provide constructive and helpful comments for possible improvement.
If there was a significant effect, comments on the strength and its meaningfulness.
As a lay reader, were you able to understand the results and their implications? Why or why not?
Required Readings
Laureate Education (Producer). (2016g). Multiple regression [Video file]. Baltimore, MD: Author.
Frankfort-Nachmias, C., & Leon-Guerrero, A. (2018). Social statistics for a diverse society (8th ed.). Thousand Oaks, CA: Sage Publications. Chapter 12, “Regression and Correlation” (pp. 325-371) (previously read in Week 8)
Wagner, W. E. (2016). Using IBM® SPSS® statistics for research methods and social science statistics (6th ed.). Thousand Oaks, CA: Sage Publications. Chapter 11, “Editing Output” (previously read in Week 2, 3, 4, 5. 6, 7, and 8)
University of Maryland Global Campus Discussion Post
Attached are 4 discussion post. Basic honestly more of myths, and perspective. IT IS NOT ACTUAL MATH PROBLEMS.
I wil ...
University of Maryland Global Campus Discussion Post
Attached are 4 discussion post. Basic honestly more of myths, and perspective. IT IS NOT ACTUAL MATH PROBLEMS.
I will also place 2 classmate post for a response. Unable to post until I post my initial post. Please be aware I will also need responses to post
POST 1
If my learning path in ALEKS is any indication, transcription errors seem to be my biggest problem, followed by the occasional interpretation error. Several of my failures to clear a topic without providing an incorrect answer are the result of either typing/clicking the wrong number or symbol (a malfunctioning mouse isn’t helping) or seeing a word problem like one I’ve just completed and failing to catch one of the variables in the word problem was changed. You’d think by now I’d realize I won’t see the exact same problem twice! As a result, I’ve learned I need to double-check my entries before I hit submit, and make sure I pulled the right numbers out of a word problem.
Since starting this course, my confidence level has risen slightly. I attribute this in large part to ALEKS and how it approaches introducing topics. I find myself making it through probably 80-90% of the problem sets it throws at me without making any errors. The learning path and explanation buttons seem to be all I need in most cases - I’ve really only opened the textbook when doing the problem sets to see how my assigned problem lines up with the examples listed.
Classmates for response Week3:
Ryan
1. Agree or disagree with one of the Math Myths listed above. Find a link to one article on the Internet to support your response.
I agree with all of the myths listed except for myths 1 and 5. I do believe that the most important thing in math (as far as the U.S. education system appears to be concerned with) is getting the correct answer. In addition, I believe that math is a very logical and calculating field that often requires a keen analytical mindset. I do not agree with the statement that men are better than women at math in natural sense as this could be blamed on a societal construct versus anything from nature. For example, teachers often underestimate the ability of females to perform math functions, leading many of them to abandon the idea of pursuing a professional career in the field by the 8th grade (AAUW 2). While this is obviously a hot-take that is not true in the slightest, it is easy to see this being the case from a historical point of view. However, times have changed and this is no longer the case. Women have pursued careers in this field at a much higher rate; so much so that I can say that I’ve only had 1 or 2 male math teachers in my entire life versus dozens of female teachers. In addition, I am not above admitting that I am not that great at math and I am sure there are plenty of women within this class and outside of here that are much better at math than me. This statement, while dated and continuously evolving, is simply incorrect.
2. Share your own current or former feelings of math anxiety. Explain how you plan to deal with it in this course.
This is the first time I’ve heard this phrase before and I can genuinely say that I have a pretty rough case of math anxiety. When I first registered for classes at UMGC, I contacted my advisor and told her to tell me what the simplest math class is because I am “too stupid for anything else”. Part of that is just my sense of humor but another part of that is because I have always struggled with math and I was just saying how I felt albeit lightheartedly. Preparation is my key to getting through this anxiety; ensuring I stay ahead of the work and don’t have to rush through everything at a later date to avoid the feeling of being overwhelmed will help me avoid these thoughts. After all, I’ve made it this far by doing this and I can make it through this class by keeping this up.
Works Cited:
AAUW. The Myth of the Male Math Brain. American Association of University Women. No Date. https://www.aauw.org/resources/article/the-myth-of-the-male-math-brain/
Daniel
I'll address Math Myth #1: Aptitude for math is inborn. I disagree with the statement - to a point. However, there a certain stereotypes associated with math that have elements of truth which tie in to this myth. I recall listening to a podcast a couple years ago which broke down the "Asians are good at math" stereotype and why it often appears to be true. Perhaps the thing I found most intriguing was discussion of a Chinese language (I don't recall if it was Cantonese, Mandarin, or both) and how it is constructed in such a way that numbers can be communicated much more efficiently than in English. Rather than having weird linguistic constructs like "eleven, "twelve", "fourteen" and "thirty-seven", the Chinese language(s) use mono-syllabic words to say "one ten and one", "one ten and two", "one ten and four", and "three tens and seven". Additionally, aspects of culture play into approach to learning as well. So, aptitude for math isn't inborn, but some people are exposed to things at an early age and given tools that enable them to excel at math.
The article I found supports both points of view, and basically concludes that certain abilities related to mathematics, such as pattern recognition, may be inborn; however, crunching numbers isn't can't exist without numbers and a way to write and say them. dissenting viewpoint addresses precisely what I described in the previous paragraph.
Article Link: http://www.scienceclarified.com/dispute/Vol-2/Do-humans-have-an-innate-capacity-for-mathematics.html
Statistical Concepts for Research questions, assignment help
Statistical Concepts for Research questions*** Original answer *** Label and number each question followed by answer ...
Statistical Concepts for Research questions, assignment help
Statistical Concepts for Research questions*** Original answer *** Label and number each question followed by answer and cite sources below each answer PLS!!!!!1. Paul states that he scored in the 100th percentile on a given standardized test. Do you believe him? Why or why not? 200 word minimum2. Actuaries work with statistics and probabilities each day. What do actuaries do and what tests do they take?(200 word minimum)3. Find a video that provides help with learning probability. Why do you like it and what did you learn? Visit this helpful website (http://www.khanacademy.org/) to assist you with your search. ( provide video link plus 200 word minimum)4. Find a study where the distribution follows a normal or bell-shaped
curve. An example of a normal distribution or bell-shaped curve, called
“Heights of Red Pine Seedlings”, is located in the beginning of
Chapter 6 in the book. Cite the source of the study you’ve selected, and
explain why you think the distribution is bell shaped. For instance,
if the study is about income, then the income may be low for a child
and peak at age forty-five and then gradually drop.
PUG Forecasting Technique What Is Your Prediction Discussion
Topic: What is your Prediction?
A time series model is a forecasting technique that attempts to predict the future values ...
PUG Forecasting Technique What Is Your Prediction Discussion
Topic: What is your Prediction?
A time series model is a forecasting technique that attempts to predict the future values of a variable by using only historical data on that one variable. Here are some examples of variables you can use to forecast. You may use a different source other than the ones listed (be sure to reference the website). There are many other variables you can use, as long as you have values that are recorded at successive intervals of time.
Currency price: XE (http://www.xe.com/currencyconverter/)
GNP: Trading Economics (http://www.tradingeconomics.com/united-states/gross-national-product)
Average home sales: National Association of Realtors (http://www.realtor.org/topics/existing-home-sales)
College tuition: National Center for Education Statistics (https://nces.ed.gov/fastfacts/display.asp?id=76)
Weather temperature or precipitation: (http://www.weather.gov/help-past-weather)
Stock price: Yahoo Finance (https://finance.yahoo.com)
Main Post: Once you have historical data, address the following:
1. State the variable you are forecasting.
2. Collect data for any time horizon (daily, monthly, yearly). Select at least 8 data values.
3. Use the Time Series Forecasting Templates to forecast using moving average, weighted moving average, and exponential smoothing (see video in Unit 9 LiveBinder).
4. Copy/paste the results of each method into your post. Be sure to state the number of periods used in the moving average method, the weights used in the weighted moving average, and the value of ? used in exponential smoothing.
5. Clearly state the “next period” prediction for each method.
Florida National University Statistics in Health Care Paper
Students will critically analyze the readings from Chapter 3 and 4 in your textbook. This assignment is designed to help y ...
Florida National University Statistics in Health Care Paper
Students will critically analyze the readings from Chapter 3 and 4 in your textbook. This assignment is designed to help you review, critique, and apply the readings to your Health Care setting as well as become the foundation for all of your remaining assignments. You need to read the article (in the additional weekly reading resources localize in the Syllabus and also in the Lectures link) assigned for week 2 and develop a 2-3-page paper reflecting your understanding and ability to apply the readings to your Health Care Setting. Each paper must be typewritten with 12-point font and double-spaced with standard margins. Follow APA style 7th edition format when referring to the selected articles and include a reference page. EACH PAPER SHOULD INCLUDE THE FOLLOWING: 1. Introduction (25%) Provide a brief synopsis of the meaning (not a description) of each Chapter and articles you read, in your own words. 2. Your Critique (50%) What is your reaction to the content of the articles? What did you learn about Prevalence, Incidence and the relationships between them? What did you learn and how you can apply Ordinal and Categorical Variables? Did these Chapter and articles change your thoughts about comparing the extent of Disease between groups? If so, how? If not, what remained the same? 3. Conclusion (15%) Briefly summarize your thoughts & conclusion to your critique of the articles and Chapter you read.How did these articles and Chapters impact your thoughts on quantifying the extent of disease and summarizing Data Collected in the sample? Evaluation will be based on how clearly you respond to the above, in particular: a) The clarity with which you critique the articles; b) The depth, scope, and organization of your paper; and, c) Your conclusions, including a description of the impact of these articles and Chapters on any Health Care Setting.
15 pages
Ames Housing
For data cleaning of the AmesHousing dataset following rules were followed a. If any of the missing observations is greate ...
Ames Housing
For data cleaning of the AmesHousing dataset following rules were followed a. If any of the missing observations is greater than 90%, then we will ...
Earn money selling
your Study Documents