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### 5 Cards in this Set

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 Properties of negatives 1. - (-X)= X 2. (-x) = (-y)= -(x+y) 3. x - y = x = (-y) 4. (-1)x= -x (-x)y = x(-y) = -xy (-x)(-y)= xy 5. -x/y = x/-y = - x/y provided y does not equal 0 absolute value if x is a real number |x| = x if x > 0 |x| = -x if x < 0 distance between two points if a and b are coordinates of two points on a number line, then the distance between those points is given by the formulas d= |a - b| or d= |b-a| the trichotomy property for any two real numbers a and b, exactly one of the following relationships must hold: a = b or ab properties of equality if a, b, and c are real numbers, then a =a (reflexive property) if a=b, then b=a (symmetric property) if a=b and b=c then a=c (transitive property)