Algebra - Equations and Inequalities

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7 Terms

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Substitution Method

isolate a variable in one equation then use what was found to plug in for the isolated variable into the next equation.

<p>isolate a variable in one equation then use what was found to plug in for the isolated variable into the next equation.</p>
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Elimination Method

Adding or subtract equations to get an equation with only one variable. Manipulate equations by multiplying across an equation

<p>Adding or subtract equations to get an equation with only one variable. Manipulate equations by multiplying across an equation</p>
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Quotient

results obtained by dividing one quantity by another

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Composite Function

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What happens when dividing by a negative number with inequalities

The inequalities sign will flip

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Absolute Value

  • Distance from zero; always positive since distance is positive

  • The absolute value of 5 and -5 both equal 5

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When solving for a variable in an absolute value…

  • one must take into account that there are two different values. What is in the absolute value and what is in the absolute value multiplied by a negative (-)