/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 79 Finding Systems of Linear Equati... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Finding Systems of Linear Equations In Exercises \(79 - 82 ,\) find two systems of linear equations that have the ordered triple as a solution. (There are many correct answers.) $$ ( 3 , - 4,2 ) $$

Short Answer

Expert verified
The first system of equations that satisfies the ordered triple (3, -4, 2) would be x = 3, y = -4, z = 2. The second system would be x - 2y = -5, y + z = -2, z = 2

Step by step solution

01

Generate the first system of equations

We can first create simple equations by just putting the variables equal to the numbers of the triple. This leads us to the equations: \[x = 3\], \[y = -4\], and \[z = 2\]
02

Generate the second system of equations

Now, we can generate another system of equations by just adding some multiples of the other variables. Let's say we add 2y to the first equation and subtract z from the second. This results in: \[x - 2y = 3 + 2*(-4)\], \[y + z = -4 + 2\], and \[z = 2\]

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Ordered Triple
An ordered triple is a way of representing a specific point in three-dimensional space, using three numbers in a particular sequence. For example, the ordered triple \(3, -4, 2\) consists of three numbers, each corresponding to one of the three axes in 3D space: \(x, y, ext{and} z\). This particular ordered triple implies that the point lies 3 units along the x-axis, -4 units along the y-axis, and 2 units along the z-axis.
In the context of systems of linear equations, an ordered triple can represent a solution that satisfies all equations in the system simultaneously. When working with equations, always maintain the order of numbers in the triple because it indicates the exact position in space. Misplacing or mixing up these numbers might lead to incorrect solutions.
Ordered triples are essential for visualizing solutions and helping understand where these solutions lie in three-dimensional space. They form the basis for plotting graphs in 3D and can also be useful in real-world applications, such as engineering, physics, and computer graphics. Understanding how to manipulate ordered triples and how they correspond to solutions of linear systems is an important part of exploring linear algebra.
Solutions of Equations
A solution of a system of linear equations is a set of values for variables that makes every equation in the system true. In a system involving three variables \(x, y, ext{and} z\), the solution can be represented as an ordered triple. The goal is to find values that satisfy each equation simultaneously.
For example, take the simple system: \,
  • \(x = 3\)
  • \(y = -4\)
  • \(z = 2\)
Each equation individually identifies a specific value for a variable. Together, these provide a comprehensive solution that can be expressed as the ordered triple \(3, -4, 2\).
Finding solutions often involves methods like substitution, elimination, or using matrices, especially in more complex systems. Always ensure that any proposed solution satisfies each equation in the original system to confirm its validity.
Understanding solutions of equations enhances the ability to tackle more complex mathematical problems, reflects the consistent behavior or scenarios described by the system, and helps interpret these situations accurately through the lens of algebra.
Linear Algebra
Linear algebra is a branch of mathematics that deals with vectors, vector spaces, linear transformations, and systems of linear equations. It's fundamental in understanding how to manipulate equations to find solutions, especially when dealing with multiple variables.
Linear systems are at the heart of linear algebra, providing frameworks to solve problems involving several equations and unknowns simultaneously. Linear algebra uses matrices and determinants as tools to simplify and solve these systems. For example, a system of equations can be expressed in matrix form, allowing for various techniques such as Gaussian elimination or Cramer's rule, which facilitate finding solutions.
Within this context, ordered triples are a great way to express solutions, as they easily describe the intersection point of planes in three-dimensional space. This makes them invaluable when exploring real-world applications where three interacting conditions or measurements exist.
As a more advanced component of mathematics, linear algebra provides the foundational base for areas such as engineering, physics, computer graphics, and any discipline where spatial representation and manipulation are required. Learning how to effectively use linear algebra concepts and methodologies is key to efficiently resolving complex problems.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Ticket Sales For a concert event, there are \(\$ 30\) reserved seat tickets and \(\$ 20\) general admission tickets. There are 2000 reserved seats available, and fire regulations limit the number of paid ticket holders to \(3000 .\) The promoter must take in at least \(\$ 75,000\) in ticket sales. Find and graph a system of inequalities describing the different numbers of tickets that can be sold.

Defense Department Outlays The table shows the total national outlays \(y\) for defense functions \((\) in billions of dollars) for the years 2004 through 2011 . (Source: \(U . S .\) Office of Management and Budget) (a) Find the least squares regression line \(y=a t+b\) for the data, where \(t\) represents the year with \(t=4\) corresponding to \(2004,\) by solving the system for \(a\) and \(b .\) $$ \left\\{\begin{aligned} 8 b+60 a &=4700.5 \\ 60 b+492 a &=36,865.0 \end{aligned}\right. $$ (b) Use the regression feature of a graphing utility to confirm the result of part (a). (c) Use the linear model to create a table of estimated values of \(y .\) Compare the estimated values with the actual data. (d) Use the linear model to estimate the total national outlay for \(2012 .\) (e) Use the Internet, your school's library, or some other reference source to find the total national outlay for \(2012 .\) How does this value compare with your answer in part (d)? (f) Is the linear model valid for long-term predictions of total national outlays? Explain.

Fitting a Line to Data To find the least squares regression line \(y=a x+b\) for a set of points \(\left(x_{1}, y_{1}\right),\left(x_{2}, y_{2}\right), \ldots,\left(x_{n}, y_{n}\right)\) you can solve the following system for \(a\) and \(b\) . $$ \left\\{\begin{array}{c}{n b+\left(\sum_{i=1}^{n} x_{i}\right) a=\left(\sum_{i=1}^{n} y_{i}\right)} \\ {\left(\sum_{i=1}^{n} x_{i}\right) b+\left(\sum_{i=1}^{n} x_{i}^{2}\right) a=\left(\sum_{i=1}^{n} x_{i} y_{i}\right)}\end{array}\right. $$ In Exercises 55 and \(56,\) the sums have been evaluated. Solve the given system for \(a\) and \(b\) to find the least squares regression line for the points. Use a graphing utility to confirm the result. $$ \left\\{\begin{aligned} 5 b+10 a &=20.2 \\ 10 b+30 a &=50.1 \end{aligned}\right. $$

A dietitian designs a special dietary supplement using two different foods. Each ounce of food X contains 20 units of calcium, 15 units of iron, and 10 units of vitamin B. Each ounce of food Y contains 10 units of calcium, 10 units of iron, and 20 units of vitamin B. The minimum daily requirements of the diet are 300 units of calcium, 150 units of iron, and 200 units of vitamin B. (a) Write a system of inequalities describing the different amounts of food X and food Y that can be used. (b) Sketch a graph of the region corresponding to the system in part (a). (c) Find two solutions of the system and interpret their meanings in the context of the problem.

Finding Systems of Linear Equations In Exercises \(79 - 82 ,\) find two systems of linear equations that have the ordered triple as a solution. (There are many correct answers.) $$ \left( - 6 , - \frac { 1 } { 2 } , - \frac { 7 } { 4 } \right) $$

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.