5.4 - Writing and Solving Systems of Equations

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What is a system of equations?

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A system of equations is a set of two or more equations with the same variables. The solution is the point(s) where the equations intersect.

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How do you represent a word problem as a system of equations?

Back

Identify the variables, translate the relationships and conditions into equations, and ensure the equations reflect the problem's constraints.

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What does the variable 'x' typically represent in a system of equations?

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In a system of equations, 'x' usually represents one of the unknown quantities that you are trying to solve for.

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What does the variable 'y' typically represent in a system of equations?

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In a system of equations, 'y' usually represents another unknown quantity that is related to 'x'.

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What is the graphical representation of a system of equations?

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The graphical representation consists of lines (or curves) on a coordinate plane, where the intersection point(s) represent the solution(s) of the system.

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What does it mean if two lines in a system of equations are parallel?

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If two lines are parallel, it means they have no points of intersection, indicating that the system has no solution.

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What does it mean if two lines in a system of equations coincide?

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If two lines coincide, they lie on top of each other, indicating that there are infinitely many solutions to the system.

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What is the substitution method in solving systems of equations?

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The substitution method involves solving one equation for one variable and then substituting that expression into the other equation.

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What is the elimination method in solving systems of equations?

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The elimination method involves adding or subtracting equations to eliminate one variable, making it easier to solve for the other.

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How can you check the solution of a system of equations?

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You can check the solution by substituting the values back into the original equations to see if they hold true.