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7th Edition

Stefan Waner + 1 other

Publisher: Cengage Learning

ISBN: 9781337280426

Chapter 4.2, Problem 50E

Textbook Problem

In Exercises 49–52, translate the given systems of equations into matrix form. [**HINT:** See Example 7.]

Finite Mathematics

Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...Ch. 4.1 - In Exercises 110, find the dimensions of the given...

Ch. 4.1 - Solve for x,y,z,andw. [HINT: See Example 1.]...Ch. 4.1 - Solve for x,y,z,andw. [HINT: See Example 1.]...Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 1320, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2128, evaluate the given expression....Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - In Exercises 2936, use technology to evaluate the...Ch. 4.1 - Sales The following table shows the number of Mac...Ch. 4.1 - Home Prices The following table shows median home...Ch. 4.1 - Inventory The Left Coast Bookstore chain has two...Ch. 4.1 - Inventory The Left Coast Bookstore chain discussed...Ch. 4.1 - Profit Annual revenues and production costs at...Ch. 4.1 - Revenue The following spreadsheet gives annual...Ch. 4.1 - Population Movement In 2000 the U.S. population,...Ch. 4.1 - Population Movement In 1990 the U.S. population,...Ch. 4.1 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.1 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.1 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.1 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.1 - Inventory Microbucks Computer Company makes two...Ch. 4.1 - Inventory Microbucks Computer Company, besides...Ch. 4.1 - Tourism in the 1990s The following table gives the...Ch. 4.1 - Tourism in the 1990s Referring to the 1998 tourism...Ch. 4.1 - Is it possible for a 23 matrix to equal a 32...Ch. 4.1 - If A and B are 23 matrices and A=B, what can you...Ch. 4.1 - What does it mean when we say that...Ch. 4.1 - What does it mean when we say that (cA)ij=c(Aij)?Ch. 4.1 - What would a 55 matrix A look like if Aii=0 for...Ch. 4.1 - What would a matrix A look like if Aij=0 whenever...Ch. 4.1 - Give a formula for the ijth entry of the transpose...Ch. 4.1 - A matrix is symmetric if it is equal to its...Ch. 4.1 - A matrix is skew-symmetric or antisymmetric if it...Ch. 4.1 - Referring to Exercises 60 and 61, what can be said...Ch. 4.1 - Why is matrix addition associative?Ch. 4.1 - Is matrix subtraction associative? Explain.Ch. 4.1 - Describe a scenario (possibly based on one of the...Ch. 4.1 - Describe a scenario (possibly based on one of the...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - In Exercises 128, compute the products. Some of...Ch. 4.2 - Find7 A2=AA,A3=AAA,A4, and A100, given that...Ch. 4.2 - Repeat Exercises 29 with A=[0201002000020000].Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - Exercises 3138 should be done in two ways: by hand...Ch. 4.2 - In Exercises 3944, calculate (a) P2=PP, (b)...Ch. 4.2 - In Exercises 3944, calculate (a) P2=PP, (b)...Ch. 4.2 - In Exercises 3944, calculate (a) P2=PP, (b)...Ch. 4.2 - In Exercises 3944, calculate (a) P2=PP, (b)...Ch. 4.2 - In Exercises 3944, calculate (a) P2=PP, (b)...Ch. 4.2 - In Exercises 3944, calculate (a) P2=PP, (b)...Ch. 4.2 - In Exercises 4548, translate the given matrix...Ch. 4.2 - In Exercises 4548, translate the given matrix...Ch. 4.2 - In Exercises 4548, translate the given matrix...Ch. 4.2 - In Exercises 4548, translate the given matrix...Ch. 4.2 - In Exercises 4952, translate the given systems of...Ch. 4.2 - In Exercises 4952, translate the given systems of...Ch. 4.2 - In Exercises 4952, translate the given systems of...Ch. 4.2 - In Exercises 4952, translate the given systems of...Ch. 4.2 - Revenue Your T-shirt operation is doing a booming...Ch. 4.2 - Revenue Karen Sandberg, your competitor in...Ch. 4.2 - Real Estate The following table shows the cost of...Ch. 4.2 - Real Estate Repeat Exercise 55 using the following...Ch. 4.2 - Revenue Recall the Left Coast Bookstore chain from...Ch. 4.2 - Profit Refer back to Exercise 57, and now suppose...Ch. 4.2 - Income Exercises 5962 are based on the following...Ch. 4.2 - Income Exercises 5962 are based on the following...Ch. 4.2 - Income Exercises 5962 are based on the following...Ch. 4.2 - Income Exercises 5962 are based on the following...Ch. 4.2 - Consumption of Dairy Products The U.S. per capita...Ch. 4.2 - Consumption of Dairy Products The U.S. per capita...Ch. 4.2 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.2 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.2 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.2 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.2 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.2 - Foreclosure Crisis Starting in 2010, on the heels...Ch. 4.2 - Costs Microbucks Computer Co. makes two computers,...Ch. 4.2 - Profits Refer back to Exercise 71. It actually...Ch. 4.2 - Tourism in the 1990s The following table gives the...Ch. 4.2 - Tourism in the 1990s Referring to the tourism...Ch. 4.2 - Population Movement In 2008 the population of the...Ch. 4.2 - Population Movement Assume that the percentages...Ch. 4.2 - Give an example of two matrices A and B such that...Ch. 4.2 - Give an example of two matrices A and B of...Ch. 4.2 - Compare addition and multiplication of 11 matrices...Ch. 4.2 - In comparing the algebra of 11 matrices, as...Ch. 4.2 - Comment on the following claim: Every matrix...Ch. 4.2 - When is it true that both AB and BA are defined,...Ch. 4.2 - Find a scenario in which it would be useful to...Ch. 4.2 - Make up an application whose solution reads as...Ch. 4.2 - What happens in a spreadsheet if, instead of using...Ch. 4.2 - Define the naive product AB of two mn matrices A...Ch. 4.3 - In Exercises 16, determine whether or not the...Ch. 4.3 - In Exercises 16, determine whether or not the...Ch. 4.3 - In Exercises 16, determine whether or not the...Ch. 4.3 - In Exercises 16, determine whether or not the...Ch. 4.3 - In Exercises 16, determine whether or not the...Ch. 4.3 - In Exercises 16, determine whether or not the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 726, use row reduction to find the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 2734, compute the determinant of the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 3542, use technology to find the...Ch. 4.3 - In Exercises 4348, use matrix inversion to solve...Ch. 4.3 - In Exercises 4348, use matrix inversion to solve...Ch. 4.3 - In Exercises 4348, use matrix inversion to solve...Ch. 4.3 - In Exercises 4348, use matrix inversion to solve...Ch. 4.3 - In Exercises 4348, use matrix inversion to solve...Ch. 4.3 - In Exercises 4348, use matrix inversion to solve...Ch. 4.3 - In Exercises 49 and 50, use matrix inversion to...Ch. 4.3 - In Exercises 49 and 50, use matrix inversion to...Ch. 4.3 - Some of the following exercises are similar or...Ch. 4.3 - Some of the following exercises are similar or...Ch. 4.3 - Some of the following exercises are similar or...Ch. 4.3 - Some of the following exercises are similar or...Ch. 4.3 - Investing: Inverse ETFs (Exchange Traded Funds)...Ch. 4.3 - Investing: Inverse ETFs (Exchange Traded Funds)...Ch. 4.3 - Investing: Lesser-Known Stocks Exercises 5758 are...Ch. 4.3 - Investing: Lesser-Known Stocks Exercises 5758 are...Ch. 4.3 - Population Movement In 2009 the population of the...Ch. 4.3 - Population Movement Assume that the percentages...Ch. 4.3 - Rotations If a point (x,y) in the plane is rotated...Ch. 4.3 - Rotations If a point (x,y) in the plane is rotated...Ch. 4.3 - Encryption Matrices are commonly used to encrypt...Ch. 4.3 - Encryption Matrices are commonly used to encrypt...Ch. 4.3 - Encryption Matrices are commonly used to encrypt...Ch. 4.3 - Encryption Matrices are commonly used to encrypt...Ch. 4.3 - Multiple choice: If A and B are square matrices...Ch. 4.3 - Multiple choice: If A is a square matrix with A3=I...Ch. 4.3 - What can you say about the inverse of a 22 matrix...Ch. 4.3 - If you think of numbers as 11 matrices, which...Ch. 4.3 - Use matrix multiplication to check that the...Ch. 4.3 - Derive the formula in Exercise 71 using row...Ch. 4.3 - A diagonal matrix D has the following form:...Ch. 4.3 - If a square matrix A row-reduces to the identity...Ch. 4.3 - If A and B are invertible, check that B1A1 is the...Ch. 4.3 - Solve the matrix equation A(B+CX)=D for X. (You...Ch. 4.3 - In Example 3 we said that, if a square matrix A...Ch. 4.3 - Your friend has two square matrices A and B,...Ch. 4.4 - In Exercises 14, calculate the expected payoff of...Ch. 4.4 - In Exercises 14, calculate the expected payoff of...Ch. 4.4 - In Exercises 14, calculate the expected payoff of...Ch. 4.4 - In Exercises 14, calculate the expected payoff of...Ch. 4.4 - In Exercises 58, either a mixed column or mixed...Ch. 4.4 - In Exercises 58, either a mixed column or mixed...Ch. 4.4 - In Exercises 58, either a mixed column or mixed...Ch. 4.4 - In Exercises 58, either a mixed column or mixed...Ch. 4.4 - In Exercises 914, reduce the given payoff matrix...Ch. 4.4 - In Exercises 914, reduce the given payoff matrix...Ch. 4.4 - In Exercises 914, reduce the given payoff matrix...Ch. 4.4 - In Exercises 914, reduce the given payoff matrix...Ch. 4.4 - In Exercises 914, reduce the given payoff matrix...Ch. 4.4 - In Exercises 914, reduce the given payoff matrix...Ch. 4.4 - In Exercises 1520, decide whether the game is...Ch. 4.4 - In Exercises 1520, decide whether the game is...Ch. 4.4 - In Exercises 1520, decide whether the game is...Ch. 4.4 - In Exercises 1520, decide whether the game is...Ch. 4.4 - In Exercises 1520, decide whether the game is...Ch. 4.4 - In Exercises 1520, decide whether the game is...Ch. 4.4 - In Exercises 2124, find (a) the optimal mixed row...Ch. 4.4 - In Exercises 2124, find (a) the optimal mixed row...Ch. 4.4 - In Exercises 2124, find (a) the optimal mixed row...Ch. 4.4 - In Exercises 2124, find (a) the optimal mixed row...Ch. 4.4 - In Exercises 2532, set up the payoff matrix. Games...Ch. 4.4 - In Exercises 2532, set up the payoff matrix. Games...Ch. 4.4 - In Exercises 2532, set up the payoff matrix. War...Ch. 4.4 - In Exercises 2532, set up the payoff matrix. War...Ch. 4.4 - In Exercises 2532, set up the payoff matrix....Ch. 4.4 - In Exercises 2532, set up the payoff matrix....Ch. 4.4 - In Exercises 2532, set up the payoff matrix....Ch. 4.4 - In Exercises 2532, set up the payoff matrix....Ch. 4.4 - Retail Discount Wars Just one week after your...Ch. 4.4 - More Retail Discount Wars Your Abercrom B mens...Ch. 4.4 - Factory Location22 A manufacturer of electrical...Ch. 4.4 - Crop Choice23 A farmer has a choice of growing...Ch. 4.4 - Study Techniques Your mathematics test is tomorrow...Ch. 4.4 - Study Techniques Your friend Joe has been spending...Ch. 4.4 - Staff Cutbacks Frank Tempest manages a large...Ch. 4.4 - Textbook Writing You are writing a college-level...Ch. 4.4 - Price Wars Computer Electronics, Inc. (CE) and the...Ch. 4.4 - More Price Wars (Refer to Exercise 41.) A new...Ch. 4.4 - Wrestling Tournaments City Community College (CCC)...Ch. 4.4 - Wrestling Tournaments (Refer to Exercise 43.) One...Ch. 4.4 - The Battle of Rabaul-Lae25 In the Second World...Ch. 4.4 - The Battle of Rabaul-Lae Referring to Exercise 45,...Ch. 4.4 - The Prisoners Dilemma Slim Lefty and Joe Rap have...Ch. 4.4 - More Prisoners Dilemmas Jane Good and Prudence...Ch. 4.4 - Campaign Strategies27 Florida and Ohio are swing...Ch. 4.4 - Campaign Strategies Repeat Exercise 49, this time...Ch. 4.4 - Advertising The Softex Shampoo Company is...Ch. 4.4 - Labor Negotiations The management team of the...Ch. 4.4 - Why is a saddle point called a saddle point?Ch. 4.4 - Can the payoff in a saddle point ever be larger...Ch. 4.4 - One day, while browsing through an old Statistical...Ch. 4.4 - Exercises 37 and 38 seem to suggest that studying...Ch. 4.4 - Explain what is wrong with a decision to play the...Ch. 4.4 - Describe a situation in which a mixed strategy and...Ch. 4.5 - Let A be the technology matrix A=[0.20.050.80.01],...Ch. 4.5 - Let A be the technology matrix...Ch. 4.5 - Each unit of television news requires 0.2 units of...Ch. 4.5 - Production of one unit of cologne requires no...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - In Exercises 512, you are given a technology...Ch. 4.5 - Given A=[0.10.40.20.5], find the changes in...Ch. 4.5 - Given A=[0.50.400.5], find the changes in...Ch. 4.5 - Let (IA)1=[0.50.100.21.20.10.10.71.6], and assume...Ch. 4.5 - Let (IA)1=[1.50.100.11.10.1001.3], and assume that...Ch. 4.5 - In Exercises 17 and 18, obtain the technology...Ch. 4.5 - In Exercises 17 and 18, obtain the technology...Ch. 4.5 - Campus Food The two campus cafeterias, the Main...Ch. 4.5 - Plagiarism Two student groups at Enormous State...Ch. 4.5 - Communication Equipment Two sectors of the U.S....Ch. 4.5 - Wood and Paper Two sectors of the U.S. economy are...Ch. 4.5 - Australia Economy Two sectors of the Australian...Ch. 4.5 - Australia Economy Two sectors of the Australian...Ch. 4.5 - Mexico Economy Economists generally divide a...Ch. 4.5 - Mexico Economy Economists generally divide a...Ch. 4.5 - Mexico Economy Economists generally divide a...Ch. 4.5 - Mexico Economy Economists generally divide a...Ch. 4.5 - Mexico Economy Economists generally divide a...Ch. 4.5 - Mexico Economy Economists generally divide a...Ch. 4.5 - Exercises 3134 require the use of technology....Ch. 4.5 - Exercises 3134 require the use of technology....Ch. 4.5 - Exercises 3134 require the use of technology....Ch. 4.5 - Exercises 3134 require the use of technology....Ch. 4.5 - What would it mean if the technology matrix A were...Ch. 4.5 - Can an external demand be met by an economy whose...Ch. 4.5 - What would it mean if the total output figure for...Ch. 4.5 - What would it mean if the total output figure for...Ch. 4.5 - What does it mean if an entry in the matrix (IA)1...Ch. 4.5 - Why do we expect the diagonal entries in the...Ch. 4.5 - Why do we expect the off-diagonal entries of (IA)1...Ch. 4.5 - Why do we expect all the entries of (IA)1 to be...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - For Exercises 110, let...Ch. 4 - In Exercises 1116, find the inverse of the given...Ch. 4 - In Exercises 1116, find the inverse of the given...Ch. 4 - In Exercises 1116, find the inverse of the given...Ch. 4 - In Exercises 1116, find the inverse of the given...Ch. 4 - In Exercises 1116, find the inverse of the given...Ch. 4 - In Exercises 1116, find the inverse of the given...Ch. 4 - In Exercises 1720, write the given system of...Ch. 4 - In Exercises 1720, write the given system of...Ch. 4 - In Exercises 1720, write the given system of...Ch. 4 - In Exercises 1720, write the given system of...Ch. 4 - In Exercises 2124, solve the game with the given...Ch. 4 - In Exercises 2124, solve the game with the given...Ch. 4 - In Exercises 2124, solve the game with the given...Ch. 4 - In Exercises 2124, solve the game with the given...Ch. 4 - In Exercises 2528, find the production vector X...Ch. 4 - In Exercises 2528, find the production vector X...Ch. 4 - In Exercises 2528, find the production vector X...Ch. 4 - In Exercises 2528, find the production vector X...Ch. 4 - It is now July 1, and online sales of romance,...Ch. 4 - It is now July 1, and online sales of romance,...Ch. 4 - It is now July 1, and online sales of romance,...Ch. 4 - It is now July 1, and online sales of romance,...Ch. 4 - It is now July 1, and online sales of romance,...Ch. 4 - It is now July 1, and online sales of romance,...Ch. 4 - Acting on a tip from Marjory Duffin, John OHagan...Ch. 4 - Acting on a tip from Marjory Duffin, John OHagan...Ch. 4 - Acting on a tip from Marjory Duffin, John OHagan...Ch. 4 - Acting on a tip from Marjory Duffin, John OHagan...Ch. 4 - OHaganBooks.com has two main...Ch. 4 - OHaganBooks.com has two main...Ch. 4 - OHaganBooks.com has two main...Ch. 4 - OHaganBooks.com has two main...Ch. 4 - Publisher Marjory Duffin reveals that...Ch. 4 - Publisher Marjory Duffin reveals that...Ch. 4 - Publisher Marjory Duffin reveals that...Ch. 4 - Publisher Marjory Duffin reveals that...Ch. 4 - Publisher Marjory Duffin reveals that...Ch. 4 - Publisher Marjory Duffin reveals that...Ch. 4 - Some of the books sold by OHaganBooks.com are...Ch. 4 - Some of the books sold by OHaganBooks.com are...Ch. 4 - Some of the books sold by OHaganBooks.com are...Ch. 4 - Some of the books sold by OHaganBooks.com are...

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True or False:

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