Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN: 9781305071742
Author: James Stewart, Lothar Redlin, Saleem Watson
Publisher: Cengage Learning
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Chapter 14.CR, Problem 13E
To determine
To find:
The number of friends.
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Question 1. Solve the system
-
x1 x2 + 3x3 + 2x4
-x1 + x22x3 + x4
2x12x2+7x3+7x4
Question 2. Consider the system
= 1
=-2
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3x1 - x2 + ax3
= 1
x1 + 3x2 + 2x3
x12x2+2x3
= -b
= 4
1 For what values of a, b will the system be inconsistent?
2 For what values of a, b will the system have only one solution?
For what values of a, b will the saystem have infinitely many solutions?
Chapter 14 Solutions
Algebra and Trigonometry (MindTap Course List)
Ch. 14.1 - CONCEPTS The Fundamental Counting Principle says...Ch. 14.1 - CONCEPTS The number of ways of arranging r objects...Ch. 14.1 - Prob. 3ECh. 14.1 - Prob. 4ECh. 14.1 - Prob. 5ECh. 14.1 - Prob. 6ECh. 14.1 - Prob. 7ECh. 14.1 - Prob. 8ECh. 14.1 - Prob. 9ECh. 14.1 - Prob. 10E
Ch. 14.1 - Prob. 11ECh. 14.1 - Prob. 12ECh. 14.1 - Prob. 13ECh. 14.1 - Prob. 14ECh. 14.1 - Prob. 15ECh. 14.1 - Prob. 16ECh. 14.1 - Prob. 17ECh. 14.1 - Prob. 18ECh. 14.1 - Prob. 19ECh. 14.1 - Prob. 20ECh. 14.1 - Prob. 21ECh. 14.1 - Prob. 22ECh. 14.1 - Prob. 23ECh. 14.1 - Prob. 24ECh. 14.1 - Prob. 25ECh. 14.1 - Rolling a Pair of Dice A red die and a white die...Ch. 14.1 - Prob. 27ECh. 14.1 - Choosing Outfits A girl has five skirts, eight...Ch. 14.1 - License Plate Standard automobile license plates...Ch. 14.1 - ID Numbers A companys employee ID number system...Ch. 14.1 - Prob. 31ECh. 14.1 - Prob. 32ECh. 14.1 - Prob. 33ECh. 14.1 - Prob. 34ECh. 14.1 - Prob. 35ECh. 14.1 - Prob. 36ECh. 14.1 - Prob. 37ECh. 14.1 - Prob. 38ECh. 14.1 - Prob. 39ECh. 14.1 - Prob. 40ECh. 14.1 - Prob. 41ECh. 14.1 - Prob. 42ECh. 14.1 - Prob. 43ECh. 14.1 - Prob. 44ECh. 14.1 - Prob. 45ECh. 14.1 - Prob. 46ECh. 14.1 - Prob. 47ECh. 14.1 - 41-52 Counting Permutations These exercises...Ch. 14.1 - Prob. 49ECh. 14.1 - 41-52 Counting Permutations These exercises...Ch. 14.1 - Prob. 51ECh. 14.1 - Prob. 52ECh. 14.1 - Prob. 53ECh. 14.1 - Prob. 54ECh. 14.1 - 53-56 Distinguishable Permutations These exercises...Ch. 14.1 - 53-56 Distinguishable Permutations These exercises...Ch. 14.1 - Prob. 57ECh. 14.1 - Room Assignments When seven students take a trip,...Ch. 14.1 - Work Assignments Eight workers are cleaning a...Ch. 14.1 - Prob. 60ECh. 14.1 - Prob. 61ECh. 14.1 - Prob. 62ECh. 14.1 - Prob. 63ECh. 14.1 - Prob. 64ECh. 14.1 - Prob. 65ECh. 14.1 - Prob. 66ECh. 14.1 - Prob. 67ECh. 14.1 - Prob. 68ECh. 14.1 - Prob. 69ECh. 14.1 - Prob. 70ECh. 14.1 - Prob. 71ECh. 14.1 - APPLICATIONS 61-74 CombinationsThese exercises...Ch. 14.1 - APPLICATIONS 61-74 CombinationsThese exercises...Ch. 14.1 - APPLICATIONS 61-74 CombinationsThese exercises...Ch. 14.1 - Prob. 75ECh. 14.1 - Prob. 76ECh. 14.1 - APPLICATIONS 75-90 Counting PrinciplesSolve these...Ch. 14.1 - Prob. 78ECh. 14.1 - Dance Committee A school dance committee is to...Ch. 14.1 - Prob. 80ECh. 14.1 - Hockey Lineup A hockey team has 20 players, of...Ch. 14.1 - Choosing a Pizza A pizza parlour offers four sizes...Ch. 14.1 - Choosing a Committee In how many ways can a...Ch. 14.1 - Prob. 84ECh. 14.1 - Arranging Books In how many ways can five...Ch. 14.1 - Prob. 86ECh. 14.1 - Seating ArrangementsIn how many ways can four men...Ch. 14.1 - Prob. 88ECh. 14.1 - Prob. 89ECh. 14.1 - Choosing a Delegation Three delegates are to be...Ch. 14.1 - DISCUSS: Pair of InitialsExplain why in any group...Ch. 14.1 - Prob. 92ECh. 14.1 - Prob. 93ECh. 14.1 - Prob. 94ECh. 14.2 - The set of all possible outcomes of an experiment...Ch. 14.2 - Let E and F be events in a sample space S. aThe...Ch. 14.2 - The conditional probability of E given that F...Ch. 14.2 - Let E and F be events in a sample space S. aThe...Ch. 14.2 - Rolling a Die An experiment consists of rolling a...Ch. 14.2 - Prob. 6ECh. 14.2 - Prob. 7ECh. 14.2 - Prob. 8ECh. 14.2 - Prob. 9ECh. 14.2 - Prob. 10ECh. 14.2 - Prob. 11ECh. 14.2 - Prob. 12ECh. 14.2 - Prob. 13ECh. 14.2 - Prob. 14ECh. 14.2 - Prob. 15ECh. 14.2 - Three CDs are picked at random from a collection...Ch. 14.2 - Prob. 17ECh. 14.2 - Prob. 18ECh. 14.2 - Prob. 19ECh. 14.2 - Prob. 20ECh. 14.2 - Prob. 21ECh. 14.2 - Prob. 22ECh. 14.2 - Prob. 23ECh. 14.2 - Prob. 24ECh. 14.2 - Prob. 25ECh. 14.2 - Prob. 26ECh. 14.2 - Prob. 27ECh. 14.2 - Prob. 28ECh. 14.2 - 29-30 Refer to the spinner in Exercises 2122. Find...Ch. 14.2 - 29-30 Refer to the spinner in Exercises 2122. Find...Ch. 14.2 - Prob. 31ECh. 14.2 - 31-32 A jar contains five red balls numbered 1 to...Ch. 14.2 - Prob. 33ECh. 14.2 - 33-40 Intersection of Events These exercises...Ch. 14.2 - Prob. 35ECh. 14.2 - Prob. 36ECh. 14.2 - Prob. 37ECh. 14.2 - Prob. 38ECh. 14.2 - 39-40 Spinners A and B shown in the figure are...Ch. 14.2 - 39-40 Spinners A and B shown in the figure are...Ch. 14.2 - Four Siblings A couple intends to have four...Ch. 14.2 - Prob. 42ECh. 14.2 - Roulette An American roulette wheel has 38 slots....Ch. 14.2 - Prob. 44ECh. 14.2 - Lottery In the 6/49 lottery game, a player selects...Ch. 14.2 - Prob. 46ECh. 14.2 - Prob. 47ECh. 14.2 - Quality Control To control the quality of their...Ch. 14.2 - Prob. 49ECh. 14.2 - Making Words A monkey is trained to arrange wooden...Ch. 14.2 - Prob. 51ECh. 14.2 - Prob. 52ECh. 14.2 - Prob. 53ECh. 14.2 - Prob. 54ECh. 14.2 - APPLICATIONS Roulette An American roulette wheel...Ch. 14.2 - APPLICATIONS Choosing a Committee A committee of...Ch. 14.2 - Prob. 57ECh. 14.2 - Prob. 58ECh. 14.2 - Prob. 59ECh. 14.2 - Prob. 60ECh. 14.2 - Prob. 61ECh. 14.2 - Prob. 62ECh. 14.2 - Prob. 63ECh. 14.2 - Prob. 64ECh. 14.2 - Prob. 65ECh. 14.2 - APPLICATIONS Making Words A monkey is trained to...Ch. 14.2 - APPLICATIONS Making WordsA monkey is trained to...Ch. 14.2 - Prob. 68ECh. 14.3 - CONCEPTS A binomial experiment is one in which...Ch. 14.3 - Prob. 2ECh. 14.3 - Prob. 3ECh. 14.3 - Prob. 4ECh. 14.3 - Prob. 5ECh. 14.3 - Prob. 6ECh. 14.3 - SKILLS 3-14Binomial Trials Five independent trials...Ch. 14.3 - Prob. 8ECh. 14.3 - Prob. 9ECh. 14.3 - Prob. 10ECh. 14.3 - Prob. 11ECh. 14.3 - Prob. 12ECh. 14.3 - Prob. 13ECh. 14.3 - Prob. 14ECh. 14.3 - Prob. 15ECh. 14.3 - SKILLS 15-16 Probability Distribution An...Ch. 14.3 - Prob. 17ECh. 14.3 - Prob. 18ECh. 14.3 - Prob. 19ECh. 14.3 - Prob. 20ECh. 14.3 - Prob. 21ECh. 14.3 - ArcheryAn archer hits his target 80 of the time....Ch. 14.3 - Prob. 23ECh. 14.3 - Prob. 24ECh. 14.3 - Prob. 25ECh. 14.3 - Prob. 26ECh. 14.3 - Prob. 27ECh. 14.3 - Prob. 28ECh. 14.3 - Prob. 29ECh. 14.3 - Prob. 30ECh. 14.3 - Defective Light Bulbs The Dim Bulb Lighting...Ch. 14.3 - Prob. 32ECh. 14.3 - Prob. 33ECh. 14.3 - Political Surveys In a certain county, 60 of the...Ch. 14.3 - Prob. 35ECh. 14.3 - Prob. 36ECh. 14.3 - Prob. 37ECh. 14.3 - Selecting CardsThree cards are randomly selected...Ch. 14.3 - Prob. 39ECh. 14.3 - Telephone Marketing A mortgage company advertises...Ch. 14.3 - Prob. 41ECh. 14.3 - Prob. 42ECh. 14.3 - Prob. 43ECh. 14.4 - CONCEPTS 1. If a game gives payoffs of 10 and 100...Ch. 14.4 - Prob. 2ECh. 14.4 - Prob. 3ECh. 14.4 - Prob. 4ECh. 14.4 - Prob. 5ECh. 14.4 - Prob. 6ECh. 14.4 - Prob. 7ECh. 14.4 - Prob. 8ECh. 14.4 - Prob. 9ECh. 14.4 - Prob. 10ECh. 14.4 - Prob. 11ECh. 14.4 - Prob. 12ECh. 14.4 - Prob. 13ECh. 14.4 - Prob. 14ECh. 14.4 - Prob. 15ECh. 14.4 - Prob. 16ECh. 14.4 - Prob. 17ECh. 14.4 - Prob. 18ECh. 14.4 - Prob. 19ECh. 14.4 - Prob. 20ECh. 14.4 - Prob. 21ECh. 14.4 - Prob. 22ECh. 14.4 - Prob. 23ECh. 14.4 - Prob. 24ECh. 14.4 - Prob. 25ECh. 14.4 - Prob. 26ECh. 14.4 - Prob. 27ECh. 14.4 - Prob. 28ECh. 14.4 - Prob. 29ECh. 14.4 - Prob. 30ECh. 14.4 - DISCUSSDISCOVERPROVEWRITE DISCUSS: The Expected...Ch. 14.CR - a What does the Fundamental Counting Principle...Ch. 14.CR - Prob. 2CCCh. 14.CR - a What is a combination of r elements of a set?...Ch. 14.CR - a In solving a problem involving picking r objects...Ch. 14.CR - a What is meant by an experiment? Sample space? b...Ch. 14.CR - Prob. 6CCCh. 14.CR - a What is meant by the conditional probability of...Ch. 14.CR - Prob. 8CCCh. 14.CR - a Suppose that a game gives payouts a1,a2,...,an...Ch. 14.CR - Prob. 1ECh. 14.CR - Prob. 2ECh. 14.CR - Prob. 3ECh. 14.CR - Prob. 4ECh. 14.CR - 1-24 Counting These exercises involve counting....Ch. 14.CR - Prob. 6ECh. 14.CR - Prob. 7ECh. 14.CR - Prob. 8ECh. 14.CR - Prob. 9ECh. 14.CR - Prob. 10ECh. 14.CR - Prob. 11ECh. 14.CR - Prob. 12ECh. 14.CR - Prob. 13ECh. 14.CR - Prob. 14ECh. 14.CR - Prob. 15ECh. 14.CR - Prob. 16ECh. 14.CR - Prob. 17ECh. 14.CR - Prob. 18ECh. 14.CR - Prob. 19ECh. 14.CR - Prob. 20ECh. 14.CR - Prob. 21ECh. 14.CR - Prob. 22ECh. 14.CR - 1-24 Counting These exercises involve counting....Ch. 14.CR - Prob. 24ECh. 14.CR - Prob. 25ECh. 14.CR - Prob. 26ECh. 14.CR - Prob. 27ECh. 14.CR - Prob. 28ECh. 14.CR - Prob. 29ECh. 14.CR - Prob. 30ECh. 14.CR - Prob. 31ECh. 14.CR - Prob. 32ECh. 14.CR - Prob. 33ECh. 14.CR - Prob. 34ECh. 14.CR - Prob. 35ECh. 14.CR - 25-42 ProbabilityThese exercises involve...Ch. 14.CR - Prob. 37ECh. 14.CR - Prob. 38ECh. 14.CR - Prob. 39ECh. 14.CR - Prob. 40ECh. 14.CR - Prob. 41ECh. 14.CR - Prob. 42ECh. 14.CR - Prob. 43ECh. 14.CR - Prob. 44ECh. 14.CR - Prob. 45ECh. 14.CR - Prob. 46ECh. 14.CR - Prob. 47ECh. 14.CR - Prob. 48ECh. 14.CR - Prob. 49ECh. 14.CR - Prob. 50ECh. 14.CT - Alice and Bill have four grandchildren, and they...Ch. 14.CT - A hospital cafeteria offers a fixed-price lunch...Ch. 14.CT - An Internet service provider requires its customer...Ch. 14.CT - Over the past year, John has purchased 30 books. a...Ch. 14.CT - A commuter must travel from Ajax to Barrie and...Ch. 14.CT - Prob. 6CTCh. 14.CT - An anagram of a word is a rearrangement of the...Ch. 14.CT - A board of directors consisting of eight members...Ch. 14.CT - Prob. 9CTCh. 14.CT - A jar contains five red balls, numbered 1 to 5,...Ch. 14.CT - Three people are chosen at random from a group of...Ch. 14.CT - Prob. 12CTCh. 14.CT - 13. In a group of four students, what is the...Ch. 14.CT - An unbalanced coin weighted so that the...Ch. 14.CT - Prob. 15CTCh. 14.FOM - Prob. 1PCh. 14.FOM - Prob. 2PCh. 14.FOM - Dividing a JackpotA game between two players...Ch. 14.FOM - Prob. 5PCh. 14.FOM - Areas of Curved Regions The Monte Carlo method can...Ch. 14.FOM - Prob. 7P
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