 7.2.1: In Exercises 1 4, determine if the given ordered triple is a soluti...
 7.2.2: In Exercises 1 4, determine if the given ordered triple is a soluti...
 7.2.3: In Exercises 1 4, determine if the given ordered triple is a soluti...
 7.2.4: In Exercises 1 4, determine if the given ordered triple is a soluti...
 7.2.5: Solve each system in Exercises 5 18.
 7.2.6: Solve each system in Exercises 5 18.
 7.2.7: Solve each system in Exercises 5 18.
 7.2.8: Solve each system in Exercises 5 18.
 7.2.9: Solve each system in Exercises 5 18.
 7.2.10: Solve each system in Exercises 5 18.
 7.2.11: Solve each system in Exercises 5 18.
 7.2.12: Solve each system in Exercises 5 18.
 7.2.13: Solve each system in Exercises 5 18.
 7.2.14: Solve each system in Exercises 5 18.
 7.2.15: Solve each system in Exercises 5 18.
 7.2.16: Solve each system in Exercises 5 18.
 7.2.17: Solve each system in Exercises 5 18.
 7.2.18: Solve each system in Exercises 5 18.
 7.2.19: In Exercises 19 22, find the quadratic functiony = ax2 + bx + c who...
 7.2.20: In Exercises 19 22, find the quadratic functiony = ax2 + bx + c who...
 7.2.21: In Exercises 19 22, find the quadratic functiony = ax2 + bx + c who...
 7.2.22: In Exercises 19 22, find the quadratic functiony = ax2 + bx + c who...
 7.2.23: The sum of three numbers is 16. The sum of twice the first number, ...
 7.2.24: The following is known about three numbers: Three times the first n...
 7.2.25: Solve each system in Exercises 25 26.
 7.2.26: Solve each system in Exercises 25 26.
 7.2.27: In Exercises 27 28, find the equation of the quadratic function who...
 7.2.28: In Exercises 27 28, find the equation of the quadratic function who...
 7.2.29: In Exercises 29 30, solve each system for in terms of the nonzero c...
 7.2.30: In Exercises 29 30, solve each system for in terms of the nonzero c...
 7.2.31: You throw a ball straight up from a rooftop. The ball misses the ro...
 7.2.32: A mathematical model can be used to describe the relationship betwe...
 7.2.33: This exercise refers to the body composition of a 135pound adult f...
 7.2.34: This exercise refers to the body composition of a 160 pound adult ...
 7.2.35: At a college production of Streetcar Named Desire, 400 tickets were...
 7.2.36: A certain brand of razor blades comes in packages of 6, 12, and 24 ...
 7.2.37: A person invested $6700 for one year, part at 8%, part at 10%, and ...
 7.2.38: A person invested $17,000 for one year, part at 10%, part at 12%, a...
 7.2.39: In the following triangle, the degree measures of the three interio...
 7.2.40: What is a system of linear equations in three variables?
 7.2.41: How do you determine whether a given ordered triple is a solution o...
 7.2.42: Describe in general terms how to solve a system in three variable
 7.2.43: AIDS is taking a deadly toll on southern Africa. Describe how to us...
 7.2.44: Does your graphing utility have a feature that allows you to solve ...
 7.2.45: Verify your results in Exercises 19 22 by using a graphing utility ...
 7.2.46: Solving a system in three variables, I found that and Because repre...
 7.2.47: A system of linear equations in three variables, and cannot contain...
 7.2.48: I m solving a threevariable system in which one of the given equat...
 7.2.49: Because the percentage of the U.S. population that was foreignborn...
 7.2.50: Describe how the system could be solved. Is it likely that in the n...
 7.2.51: A modernistic painting consists of triangles, rectangles, and penta...
 7.2.52: Group members should develop appropriate functions that model each ...
 7.2.53: Exercises 53 55 will help you prepare for the material covered in t...
 7.2.54: Exercises 53 55 will help you prepare for the material covered in t...
 7.2.55: Exercises 53 55 will help you prepare for the material covered in t...
Solutions for Chapter 7.2: Systems of Linear Equations in Three Variables
Full solutions for Precalculus  4th Edition
ISBN: 9780321559845
Solutions for Chapter 7.2: Systems of Linear Equations in Three Variables
Get Full SolutionsPrecalculus was written by and is associated to the ISBN: 9780321559845. This expansive textbook survival guide covers the following chapters and their solutions. Since 55 problems in chapter 7.2: Systems of Linear Equations in Three Variables have been answered, more than 48658 students have viewed full stepbystep solutions from this chapter. This textbook survival guide was created for the textbook: Precalculus, edition: 4. Chapter 7.2: Systems of Linear Equations in Three Variables includes 55 full stepbystep solutions.

Additive identity for the complex numbers
0 + 0i is the complex number zero

Amplitude
See Sinusoid.

Extracting square roots
A method for solving equations in the form x 2 = k.

Gaussian elimination
A method of solving a system of n linear equations in n unknowns.

Hyperboloid of revolution
A surface generated by rotating a hyperbola about its transverse axis, p. 607.

Line of symmetry
A line over which a graph is the mirror image of itself

Mapping
A function viewed as a mapping of the elements of the domain onto the elements of the range

Mathematical model
A mathematical structure that approximates phenomena for the purpose of studying or predicting their behavior

Measure of center
A measure of the typical, middle, or average value for a data set

Multiplication property of inequality
If u < v and c > 0, then uc < vc. If u < and c < 0, then uc > vc

n factorial
For any positive integer n, n factorial is n! = n.(n  1) . (n  2) .... .3.2.1; zero factorial is 0! = 1

Negative linear correlation
See Linear correlation.

Onetoone rule of exponents
x = y if and only if bx = by.

Piecewisedefined function
A function whose domain is divided into several parts with a different function rule applied to each part, p. 104.

Reflection across the xaxis
x, y and (x,y) are reflections of each other across the xaxis.

Regression model
An equation found by regression and which can be used to predict unknown values.

Scatter plot
A plot of all the ordered pairs of a twovariable data set on a coordinate plane.

Standard form: equation of a circle
(x  h)2 + (y  k2) = r 2

Standard position (angle)
An angle positioned on a rectangular coordinate system with its vertex at the origin and its initial side on the positive xaxis

Trigonometric form of a complex number
r(cos ? + i sin ?)