Dependent system

(noun)

A system of equations with an infinite number of solutions. For systems of equations in three variables, there are an infinite number of solutions on a line or plane that is the intersection of three planes in space.

Related Terms

  • Independent systems
  • nsistent system
  • Independent system
  • Inconsistent system

Examples of Dependent system in the following topics:

  • Inconsistent and Dependent Systems in Two Variables

    • For linear equations in two variables, inconsistent systems have no solution, while dependent systems have infinitely many solutions.
    • An inconsistent system has no solution, and a dependent system has an infinite number of solutions.
    • We will now focus on identifying dependent and inconsistent systems of linear equations.
    • Systems that are not independent are by definition dependent.
    • We can apply the substitution or elimination methods for solving systems of equations to identify dependent systems.
  • Inconsistent and Dependent Systems in Three Variables

    • Systems of equations in three variables are either independent, dependent, or inconsistent; each case can be established algebraically and represented graphically.
    • Dependent systems have an infinite number of solutions.
    • We know from working with systems of equations in two variables that a dependent system of equations has an infinite number of solutions.
    • The same is true for dependent systems of equations in three variables.
    • Explain what it means, graphically, for systems of equations in three variables to be inconsistent or dependent, as well as how to recognize algebraically when this is the case
  • Inconsistent and Dependent Systems

    • ) and dependency (are the equations linearly independent?
    • Systems that are not independent are by definition dependent.
    • are dependent, because the third equation is the sum of the other two.
    • In general, inconsistencies occur if the left-hand sides of the equations in a system are linearly dependent, and the constant terms do not satisfy the dependence relation.
    • The equations x − 2y = −1, 3x + 5y = 8, and 4x + 3y = 7 are not linearly independent, i.e. are dependent.
  • Introduction to Systems of Equations

    • A system of equations consists of two or more equations with two or more variables, where any solution must satisfy all of the equations in the system at the same time.
    • To find the unique solution to a system of linear equations, we must find a numerical value for each variable in the system that will satisfy all of the system's equations at the same time.
    • A solution to the system above is given by
    • An inconsistent system has no solution.
    • A dependent system has infinitely many solutions.
  • The Cartesian System

    • The revenue, or output, depends upon the number of cars, or input, that have their cars washed.  
    • Therefore, the revenue is the dependent variable (y) and the number of cars is the independent variable (x).  
    • The four quadrants of a Cartesian coordinate system.
    • The four quadrants of a Cartesian coordinate system.
    • The Cartesian coordinate system with 4 points plotted, including the origin $(0,0)$.
  • Matrix Equations

    • Matrices can be used to compactly write and work with systems of multiple linear equations.
    • Matrices can be used to compactly write and work with systems of equations.
    • This is very helpful when we start to work with systems of equations.
    • Thus, we want to solve a system $AX=B$, for $X$.  
    • No, if the coefficient matrix is not invertible, the system could be inconsistent and have no solution, or be dependent and have infinitely many solutions.
  • Models Involving Nonlinear Systems of Equations

    • Nonlinear systems of equations can be used to solve complex problems involving multiple known relationships.
    • Three or more signals reduce the solution of the system to a single coordinate point.
    • The kinetic energy of the objects depends on the speed squared, and the momentum depends on the speed directly.
    • In addition to practical scenarios like the above, nonlinear systems can be used in abstract problems.
    • Extend the ideas behind nonlinear systems of equations to real world applications
  • Graphs of Linear Inequalities

    • Second, shade either above or below the line, depending on if $y$ is greater or less than $mx+b$.  
    • These overlaps of the shaded regions indicate all solutions (ordered pairs) to the system.
    • This also means that if there are inequalities that don't overlap, then there is no solution to the system.
    • The brown overlapped shaded area is the final solution to the system of linear inequalities because it is comprised of all possible solutions to $y<-\frac{1}{2}x+1$ (the dotted red line and red area below the line) and $y\geq x-2$ (the solid green line and the green area above the line).  
    • The origin is a solution to the system, but the point $(3,0)$ is not.
  • Applications of Hyperbolas

    • The angle between the ground plane and the sunlight cone depends on where you are on the Earth, and the axial tilt of Earth, which changes seasonally.
    • Depending on the orbital properties, including size and shape (eccentricity), this orbit can be any of the four conic sections.
    • A parabolic trajectory does have the particle escaping the system.
  • Common Bases of Logarithms

    • The acidity depends on the hydrogen ion concentration in the liquid (in moles per liter) written as [H+].
    • The entropy (S) of a system can be calculated from the natural logarithm of the number of possible microstates (W) the system can adopt:
    • In equal temperament, the frequency ratio depends only on the interval between two tones, not on the specific frequency, or pitch, of the individual tones.
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