Chapter 4 Systems of Equations 4.1 Systems of Equations in Two Variables.
Systems of Equations. What you should be able to answer after learning about systems of...
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Transcript of Systems of Equations. What you should be able to answer after learning about systems of...
Systems of Equations
What you should be able to answer after learning about systems of equations…..
A gym membership at one gym costs $10 every month plus a one-time membership fee of $15, and a gym membership at a another gym costs $4 every month plus a one-time $40 membership fee. After about how many months will the gym membership cost the same amount?
Definitions• A System of Linear Equations consists of two or
more linear equations that have the same variables.
• A Solution of a System of Linear Equations is any order pair that satisfies all the equations.
• A Consistent System has at least one solution.
• An Independent System has exactly one solution.
• A Dependent System has infinitely many solutions.
• An Inconsistent System has no solution.
Special Cases
• One Point of intersection.
• One solution
• Consistent
• Independent
• Different Slope
• The same line
• Infinitely many solutions
• Consistent
• Dependent
• Coincident Lines
• Same slope
• Same Intercept
• Parellel Lines
• No Intersection
• No Solution
• Inconsistent
• Same slope
• Different Y-Intercept
Steps to find solution
• Change both equations to slope intercept form (if needed)
• Graph the lines using the y-intercept and slope.
• Y = mx + b m = slopeb = y – intercept (starting point)