| addition property of equality | If a = b, then a + c = b + c.
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| complementary | Two angles with a sum of 90 degrees.
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| conditional equation | An equation that has at least one real solution but is not an identity.
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| division property of equality | If a = b, then a/c = b/c, c ≠ 0.
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| equivalent equations | Equations that have the same solution.
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| formula | An equation involving two or more variables.
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| graph of an equation | An illustration that shows all ordered pairs that satisfy the equation.
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| identity | An equation that is satisfied by every real number for which both sides are defined.
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| inconsistent equation | An equation that has no solution.
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| literal equation | A formula.
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| multiplication property of equality | If a = b, then ac = bc.
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| rate | A comparison of numbers that have different or unlike units of measure.
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| subtraction property of equality | If a = b, then a - c = b - c.
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| supplementary | Two angles with a sum of 180 degrees.
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| uniform motion | Motion at a constant rate.
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2002 McGraw-Hill Higher Education