College Algebra
10th Edition
ISBN: 9781337282291
Author: Ron Larson
Publisher: Cengage Learning
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Chapter 4.3, Problem 41E
Finding the Standard Equation of an Ellipse In Exercises 33-42, find the standard form of the equation of the ellipse with the given characteristics and center at the origin.
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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
= 1
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 4 Solutions
College Algebra
Ch. 4.1 - Find the domain of f(x)=3xx1 and discuss the...Ch. 4.1 - Find all vertical and horizontal asymptotes of the...Ch. 4.1 - Prob. 3ECPCh. 4.1 - The cost C (in millions of dollars) of removing...Ch. 4.1 - A business has a cost function of C=0.4x+8000,...Ch. 4.1 - Fill in the blanks. A is a quotient of polynomial...Ch. 4.1 - Fill in the blanks. When fxasxafrom the left or...Ch. 4.1 - Fill in the blanks. When fxbas x, y=bis a of the...Ch. 4.1 - The graph of fx=1/x is a .Ch. 4.1 - Finding the Domain of a Rational Function In...
Ch. 4.1 - Finding the Domain of a Rational Function In...Ch. 4.1 - Prob. 7ECh. 4.1 - Prob. 8ECh. 4.1 - Prob. 9ECh. 4.1 - Finding the Domain of a Rational Function In...Ch. 4.1 - Finding the Domain of a Rational Function In...Ch. 4.1 - Finding the Domain of a Rational Function In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Prob. 20ECh. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Finding Vertical and Horizontal Asymptotes In...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Matching In Exercises 29-36, match the rational...Ch. 4.1 - Numerical Analysis In Exercises 37-40, In this...Ch. 4.1 - Numerical Analysis In Exercises 37-40, In this...Ch. 4.1 - Prob. 39ECh. 4.1 - Numerical Analysis In Exercises 37-40, In this...Ch. 4.1 - Recycling The cost C (in dollars) of supplying...Ch. 4.1 - Ecology The cost C (in millions of dollars) of...Ch. 4.1 - Population Growth The game commission introduces...Ch. 4.1 - Biology A science class performs an experiment...Ch. 4.1 - Psychologists have developed mathematical models...Ch. 4.1 - Physics Experiment Consider a physics laboratory...Ch. 4.1 - The graph of a polynomial function can have...Ch. 4.1 - Prob. 48ECh. 4.1 - Prob. 49ECh. 4.1 - The graph of a rational function f(x)=N(x)D(x)is...Ch. 4.1 - Prob. 51ECh. 4.1 - Prob. 52ECh. 4.1 - Prob. 53ECh. 4.1 - Prob. 54ECh. 4.1 - Prob. 55ECh. 4.1 - Prob. 56ECh. 4.1 - Prob. 57ECh. 4.1 - Prob. 58ECh. 4.2 - Sketch the graph of f(x)=1x+3and state its domain.Ch. 4.2 - Prob. 2ECPCh. 4.2 - Prob. 3ECPCh. 4.2 - Prob. 4ECPCh. 4.2 - Prob. 5ECPCh. 4.2 - Prob. 6ECPCh. 4.2 - Prob. 1ECh. 4.2 - Prob. 2ECh. 4.2 - Prob. 3ECh. 4.2 - Prob. 4ECh. 4.2 - Prob. 5ECh. 4.2 - Prob. 6ECh. 4.2 - Prob. 7ECh. 4.2 - Prob. 8ECh. 4.2 - Prob. 9ECh. 4.2 - Prob. 10ECh. 4.2 - Prob. 11ECh. 4.2 - Prob. 12ECh. 4.2 - Prob. 13ECh. 4.2 - Prob. 14ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 16ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 18ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 20ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 22ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 24ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 26ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 28ECh. 4.2 - Prob. 29ECh. 4.2 - Prob. 30ECh. 4.2 - Prob. 31ECh. 4.2 - Prob. 32ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 34ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 36ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 38ECh. 4.2 - Prob. 39ECh. 4.2 - Prob. 40ECh. 4.2 - Sketching the Graph of a Rational Function In...Ch. 4.2 - Prob. 42ECh. 4.2 - Prob. 43ECh. 4.2 - Prob. 44ECh. 4.2 - Prob. 45ECh. 4.2 - Prob. 46ECh. 4.2 - Prob. 47ECh. 4.2 - Prob. 48ECh. 4.2 - A Rational Function with a Slant Asymptote In...Ch. 4.2 - Prob. 50ECh. 4.2 - In this question, (a) state the domain of the...Ch. 4.2 - Prob. 52ECh. 4.2 - In Exercises 47-62, (a) state the domain of the...Ch. 4.2 - In Exercises 47-62, (a) state the domain of the...Ch. 4.2 - Prob. 55ECh. 4.2 - Prob. 56ECh. 4.2 - Prob. 57ECh. 4.2 - Prob. 58ECh. 4.2 - Prob. 59ECh. 4.2 - Prob. 60ECh. 4.2 - Prob. 61ECh. 4.2 - Prob. 62ECh. 4.2 - Prob. 63ECh. 4.2 - Prob. 64ECh. 4.2 - Prob. 65ECh. 4.2 - Prob. 66ECh. 4.2 - Prob. 67ECh. 4.2 - Prob. 68ECh. 4.2 - Prob. 69ECh. 4.2 - Prob. 70ECh. 4.2 - Prob. 71ECh. 4.2 - Prob. 72ECh. 4.2 - Prob. 73ECh. 4.2 - Prob. 74ECh. 4.2 - Prob. 75ECh. 4.2 - Prob. 76ECh. 4.2 - Prob. 77ECh. 4.2 - Prob. 78ECh. 4.2 - Prob. 79ECh. 4.2 - Page Design A rectangular page contains 64square...Ch. 4.2 - A page that is x inches wide and y inches high...Ch. 4.2 - Concentration of a Mixture A 1000-liter tank...Ch. 4.2 - Prob. 83ECh. 4.2 - Prob. 84ECh. 4.2 - Prob. 85ECh. 4.2 - Prob. 86ECh. 4.2 - Prob. 87ECh. 4.2 - Prob. 88ECh. 4.2 - Average Speed A driver’s average speed is 50 miles...Ch. 4.2 - Medicine The concentration Cof a chemical in the...Ch. 4.2 - Prob. 91ECh. 4.2 - Prob. 92ECh. 4.2 - Prob. 93ECh. 4.2 - Prob. 94ECh. 4.2 - Prob. 95ECh. 4.2 - Prob. 96ECh. 4.2 - Writing and Graphing a Rational Function Write a...Ch. 4.2 - Prob. 98ECh. 4.2 - Prob. 99ECh. 4.3 - Find the focus and directrix of the parabola...Ch. 4.3 - Find the standard form of the equation of the...Ch. 4.3 - Prob. 3ECPCh. 4.3 - Prob. 4ECPCh. 4.3 - Prob. 5ECPCh. 4.3 - Prob. 6ECPCh. 4.3 - Prob. 7ECPCh. 4.3 - Fill in the blanks. A is the intersection of a...Ch. 4.3 - Prob. 2ECh. 4.3 - Fill in the blanks. A is the set of all points...Ch. 4.3 - Fill in the blanks. The line that passes through...Ch. 4.3 - Fill in the blanks. An is the set of all points...Ch. 4.3 - Fill in the blanks. The chord joining the vertices...Ch. 4.3 - Fill in the blanks. A is the set of all points...Ch. 4.3 - Fill in the blanks. The line segment connecting...Ch. 4.3 - Matching In Exercises 9-14, this question, match...Ch. 4.3 - Matching In Exercises 9-14, match the equation...Ch. 4.3 - Matching In Exercises 9-14, match the equation...Ch. 4.3 - Matching In Exercises 9-14, this question, match...Ch. 4.3 - Matching In Exercises 9-14, this question, match...Ch. 4.3 - Matching In Exercises 9-14, this question, match...Ch. 4.3 - Finding the Focus and Directrix of a Parabola In...Ch. 4.3 - Prob. 16ECh. 4.3 - Finding the Focus and Directrix of a Parabola In...Ch. 4.3 - Finding the Focus and Directrix of a Parabola In...Ch. 4.3 - Prob. 19ECh. 4.3 - Prob. 20ECh. 4.3 - Finding the Standard Equation of a Parabola In...Ch. 4.3 - Finding the Standard Equation of a Parabola In...Ch. 4.3 - Finding the Standard Equation of a Parabola In...Ch. 4.3 - Finding the Standard Equation of a Parabola In...Ch. 4.3 - Prob. 25ECh. 4.3 - Prob. 26ECh. 4.3 - In Exercises 27 and 28, Find the standard form of...Ch. 4.3 - In Exercises 27 and 28, Find the standard form of...Ch. 4.3 - The light bulb in a flashlight is at the focus of...Ch. 4.3 - The receiver of a parabolic satellite dish is at...Ch. 4.3 - Suspension Bridge Each cable of the Golden Gate...Ch. 4.3 - Beam Deflection A simply supported beam (see...Ch. 4.3 - Finding the Standard Equation of an Ellipse In...Ch. 4.3 - Prob. 34ECh. 4.3 - Prob. 35ECh. 4.3 - Prob. 36ECh. 4.3 - Prob. 37ECh. 4.3 - Prob. 38ECh. 4.3 - Prob. 39ECh. 4.3 - Prob. 40ECh. 4.3 - Finding the Standard Equation of an Ellipse In...Ch. 4.3 - Prob. 42ECh. 4.3 - Sketching an Ellipse In Exercises 43-52, find the...Ch. 4.3 - Prob. 44ECh. 4.3 - Sketching an Ellipse In Exercises 43-52, find the...Ch. 4.3 - Prob. 46ECh. 4.3 - Sketching an Ellipse In Exercises 43-52, find the...Ch. 4.3 - Prob. 48ECh. 4.3 - Sketching an Ellipse In Exercises 43-52, find the...Ch. 4.3 - Prob. 50ECh. 4.3 - Prob. 51ECh. 4.3 - Prob. 52ECh. 4.3 - Prob. 53ECh. 4.3 - Prob. 54ECh. 4.3 - Architecture A mason is building a semielliptical...Ch. 4.3 - A semielliptical arch over a tunnel for a one-way...Ch. 4.3 - Prob. 57ECh. 4.3 - Geometry A line segment through a focus of an...Ch. 4.3 - Using Latera Recta In Exercises 59-62, sketch the...Ch. 4.3 - Prob. 60ECh. 4.3 - Prob. 61ECh. 4.3 - Prob. 62ECh. 4.3 - Prob. 63ECh. 4.3 - Prob. 64ECh. 4.3 - Prob. 65ECh. 4.3 - Prob. 66ECh. 4.3 - Prob. 67ECh. 4.3 - Prob. 68ECh. 4.3 - Prob. 69ECh. 4.3 - Prob. 70ECh. 4.3 - Sketching a Hyperbola In Exercises 71-80, find the...Ch. 4.3 - Prob. 72ECh. 4.3 - Sketching a Hyperbola In Exercises 71-80, find the...Ch. 4.3 - Prob. 74ECh. 4.3 - Sketching a Hyperbola In Exercises 71-80, find the...Ch. 4.3 - Prob. 76ECh. 4.3 - Prob. 77ECh. 4.3 - Prob. 78ECh. 4.3 - Sketching a Hyperbola In Exercises 71-80, find the...Ch. 4.3 - Prob. 80ECh. 4.3 - Art A cross section of a sculpture can be modeled...Ch. 4.3 - Optics A hyperbolic mirror (used in some...Ch. 4.3 - When an airplane travels faster than the speed of...Ch. 4.3 - Navigation Long-distance radio navigation for...Ch. 4.3 - Prob. 85ECh. 4.3 - Prob. 86ECh. 4.3 - Prob. 87ECh. 4.3 - Prob. 88ECh. 4.3 - Area of an Ellipse Consider the ellipse...Ch. 4.3 - Prob. 90ECh. 4.3 - Prob. 91ECh. 4.3 - Prob. 92ECh. 4.3 - Prob. 93ECh. 4.3 - Prob. 94ECh. 4.3 - Prob. 95ECh. 4.3 - Prob. 96ECh. 4.3 - Drawing Ellipses Use two thumbtacks, a string, and...Ch. 4.3 - Prob. 98ECh. 4.3 - Prob. 99ECh. 4.4 - Identify each conic. Then describe the translation...Ch. 4.4 - Prob. 2ECPCh. 4.4 - Prob. 3ECPCh. 4.4 - Prob. 4ECPCh. 4.4 - Prob. 5ECPCh. 4.4 - Prob. 6ECPCh. 4.4 - Prob. 7ECPCh. 4.4 - Prob. 1ECh. 4.4 - Prob. 2ECh. 4.4 - Prob. 3ECh. 4.4 - Prob. 4ECh. 4.4 - Prob. 5ECh. 4.4 - Prob. 6ECh. 4.4 - Prob. 7ECh. 4.4 - Prob. 8ECh. 4.4 - Prob. 9ECh. 4.4 - Prob. 10ECh. 4.4 - Prob. 11ECh. 4.4 - Prob. 12ECh. 4.4 - Prob. 13ECh. 4.4 - Prob. 14ECh. 4.4 - Prob. 15ECh. 4.4 - Prob. 16ECh. 4.4 - Prob. 17ECh. 4.4 - Prob. 18ECh. 4.4 - Prob. 19ECh. 4.4 - Prob. 20ECh. 4.4 - Prob. 21ECh. 4.4 - Prob. 22ECh. 4.4 - Prob. 23ECh. 4.4 - Prob. 24ECh. 4.4 - Prob. 25ECh. 4.4 - Prob. 26ECh. 4.4 - Prob. 27ECh. 4.4 - Finding Characteristics of a Parabola In Exercises...Ch. 4.4 - Finding Characteristics of a Parabola In Exercises...Ch. 4.4 - Finding Characteristics of a Parabola In Exercises...Ch. 4.4 - Prob. 31ECh. 4.4 - Prob. 32ECh. 4.4 - Finding Characteristics of a Parabola In Exercises...Ch. 4.4 - Prob. 34ECh. 4.4 - Finding the Standard Equation of a Parabola In...Ch. 4.4 - Finding the Standard Equation of a Parabola In...Ch. 4.4 - Prob. 37ECh. 4.4 - Prob. 38ECh. 4.4 - Finding the Standard Equation of a Parabola In...Ch. 4.4 - Prob. 40ECh. 4.4 - Prob. 41ECh. 4.4 - Fluid Flow Water flowing from a horizontal pipe 48...Ch. 4.4 - Prob. 43ECh. 4.4 - Prob. 44ECh. 4.4 - Prob. 45ECh. 4.4 - Prob. 46ECh. 4.4 - Prob. 47ECh. 4.4 - Prob. 48ECh. 4.4 - Prob. 49ECh. 4.4 - Prob. 50ECh. 4.4 - Prob. 51ECh. 4.4 - Prob. 53ECh. 4.4 - Prob. 54ECh. 4.4 - Prob. 55ECh. 4.4 - Prob. 56ECh. 4.4 - Finding the Standard Equation of an Ellipse In...Ch. 4.4 - Prob. 58ECh. 4.4 - Prob. 59ECh. 4.4 - Prob. 60ECh. 4.4 - Prob. 61ECh. 4.4 - Prob. 62ECh. 4.4 - Prob. 63ECh. 4.4 - Prob. 64ECh. 4.4 - Planetary Motion The dwarf planet Pluto moves in...Ch. 4.4 - Australian Football In Australia, football by...Ch. 4.4 - Prob. 67ECh. 4.4 - Prob. 68ECh. 4.4 - Prob. 69ECh. 4.4 - Prob. 70ECh. 4.4 - Prob. 71ECh. 4.4 - Prob. 72ECh. 4.4 - Prob. 73ECh. 4.4 - Prob. 74ECh. 4.4 - Prob. 75ECh. 4.4 - Prob. 76ECh. 4.4 - Prob. 77ECh. 4.4 - Prob. 78ECh. 4.4 - Prob. 79ECh. 4.4 - Prob. 80ECh. 4.4 - Prob. 81ECh. 4.4 - Prob. 82ECh. 4.4 - Prob. 83ECh. 4.4 - Prob. 84ECh. 4.4 - Prob. 85ECh. 4.4 - Prob. 86ECh. 4.4 - Prob. 87ECh. 4.4 - Prob. 88ECh. 4.4 - Prob. 89ECh. 4.4 - Prob. 90ECh. 4.4 - Prob. 91ECh. 4.4 - Prob. 92ECh. 4.4 - Prob. 93ECh. 4.4 - Prob. 94ECh. 4.4 - Prob. 95ECh. 4 - Finding the Domain of a Rational Function In...Ch. 4 - Prob. 2RECh. 4 - Prob. 3RECh. 4 - Prob. 4RECh. 4 - Prob. 5RECh. 4 - Prob. 6RECh. 4 - Finding Vertical and Horizontal Asymptotes In...Ch. 4 - Prob. 8RECh. 4 - Prob. 9RECh. 4 - Prob. 10RECh. 4 - Prob. 11RECh. 4 - Seizure of Illegal Drugs The cost C(in millions of...Ch. 4 - Prob. 13RECh. 4 - Prob. 14RECh. 4 - Prob. 15RECh. 4 - Prob. 16RECh. 4 - Prob. 17RECh. 4 - Prob. 18RECh. 4 - Prob. 19RECh. 4 - Prob. 20RECh. 4 - Prob. 21RECh. 4 - Prob. 22RECh. 4 - Prob. 23RECh. 4 - Prob. 24RECh. 4 - Prob. 25RECh. 4 - Prob. 26RECh. 4 - Prob. 27RECh. 4 - Prob. 28RECh. 4 - Prob. 29RECh. 4 - Prob. 30RECh. 4 - Prob. 31RECh. 4 - Prob. 32RECh. 4 - Prob. 33RECh. 4 - The concentration C of a chemical in the...Ch. 4 - Prob. 35RECh. 4 - Prob. 36RECh. 4 - Prob. 37RECh. 4 - Prob. 38RECh. 4 - Prob. 39RECh. 4 - Prob. 40RECh. 4 - Prob. 41RECh. 4 - Prob. 42RECh. 4 - Prob. 43RECh. 4 - Prob. 44RECh. 4 - Prob. 45RECh. 4 - Prob. 46RECh. 4 - Prob. 47RECh. 4 - Prob. 48RECh. 4 - Prob. 49RECh. 4 - Suspension Bridge Each cable of a suspension...Ch. 4 - Prob. 51RECh. 4 - Finding the Standard Equation of an Ellipse In...Ch. 4 - Prob. 53RECh. 4 - Prob. 54RECh. 4 - Prob. 55RECh. 4 - Prob. 56RECh. 4 - Architecture A semi elliptical archway is formed...Ch. 4 - Wading Pool You are building a wading pool that is...Ch. 4 - Prob. 59RECh. 4 - Prob. 60RECh. 4 - Prob. 61RECh. 4 - Prob. 62RECh. 4 - Prob. 63RECh. 4 - Prob. 64RECh. 4 - Prob. 65RECh. 4 - Prob. 66RECh. 4 - Prob. 67RECh. 4 - Prob. 68RECh. 4 - Prob. 69RECh. 4 - Prob. 70RECh. 4 - Prob. 71RECh. 4 - Finding the Standard Equation of an Ellipse In...Ch. 4 - Prob. 73RECh. 4 - Prob. 74RECh. 4 - Prob. 75RECh. 4 - Prob. 76RECh. 4 - Prob. 77RECh. 4 - Prob. 78RECh. 4 - Prob. 79RECh. 4 - Prob. 80RECh. 4 - Prob. 81RECh. 4 - Prob. 82RECh. 4 - Prob. 83RECh. 4 - Prob. 84RECh. 4 - Architecture A parabolic archway is 12 meters high...Ch. 4 - Architecture A church window is bounded above by a...Ch. 4 - Running Path Let (0,0) represent a water fountain...Ch. 4 - Prob. 88RECh. 4 - Prob. 89RECh. 4 - Prob. 90RECh. 4 - In Exercises 1-3, find the domain of the function...Ch. 4 - In Exercises 1-3, find the domain of the function...Ch. 4 - In Exercises 1-3, find the domain of the function...Ch. 4 - Prob. 4TCh. 4 - In Exercises 4-9, identify any intercepts and...Ch. 4 - In Exercises 4-9, identify any intercepts and...Ch. 4 - In Exercises 4-9, identify any intercepts and...Ch. 4 - In Exercises 4-9, identify any intercepts and...Ch. 4 - In Exercises 4-9, identify any intercepts and...Ch. 4 - Prob. 10TCh. 4 - A triangle is formed by the coordinate axes and a...Ch. 4 - Prob. 12TCh. 4 - Sketch the conic and identify the center,...Ch. 4 - Prob. 14TCh. 4 - In Exercises 12-17, sketch the conic and identify...Ch. 4 - Prob. 16TCh. 4 - In Exercises 12-17, sketch the conic and identify...Ch. 4 - Find the standard form of the equation of the...Ch. 4 - Find the standard form of the equation of the...Ch. 4 - Prob. 20TCh. 4 - The moon orbits Earth in an elliptical path with...Ch. 4 - Match the graph of the rational function...Ch. 4 - Prob. 2PSCh. 4 - Distinct Vision The endpoints of the interval over...Ch. 4 - Statuary Hall is an elliptical room in the United...Ch. 4 - Property of a Hyperbola Use the figure to show...Ch. 4 - Prob. 6PSCh. 4 - Tour Boat A tour boat travels between two islands...Ch. 4 - The filament of a light bulb is a thin wire that...Ch. 4 - Prob. 9PSCh. 4 - Prob. 10PSCh. 4 - Prob. 11PS
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College Algebra (MindTap Course List)
Algebra
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Author:R. David Gustafson, Jeff Hughes
Publisher:Cengage Learning
Algebra & Trigonometry with Analytic Geometry
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ISBN:9781133382119
Author:Swokowski
Publisher:Cengage
What is Ellipse?; Author: Don't Memorise;https://www.youtube.com/watch?v=nzwCInIMlU4;License: Standard YouTube License, CC-BY