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21 Cards in this Set
 Front
 Back
Real # (R)

any point on the number line


Natural # (N)

counting numbers; N = +Z = {1,2,3...}


Whole # (W)

counting numbers, including 0; W = {0,1,2,3...}


Intergers (Z)

Z = {...2,1,0,1,2...}


Rational # (Q)

Q = {p/qp,q€Z,q≠0}


Irrational # (IR)

IR = {xx€R,x≠Q}


Imaginary # (I)

I = {aia€R,x≠Q}


Complex # (C)

C = {a+bia€R,bi€I}


Inequality Notation

If a,b€R, then a<b if a is to the left of b on the number line and a>b if a is to the right of b on the number line


Algebraic Expression

An algebraic expression is the result of adding, subtracting, multiplying, dividing, taking roots, etc...on any collection of variables and numbers


Algebraic Equation

A statement that two algebraic expressions are equal and can be solved


Linear equation in one variable

ax = b where a,b€R and a≠0


Conditional Solution for Linear equation in one variable

Algebraic: one solution
Graphic: Single point on number line 

Contradiction Solution for Linear equation in one variable

Algebraic: no solution
Graphic: empty number line 

Identity Solution for Linear equation in one variable

Algebraic: Infinite number of solutions
Graphic: entire number line 

Linear inequalities in one variable

a linear inequality in one variable can be written in the form ax<b where a and b are real numbers, with a≠0 (>,≤,≥)


Union of 2 sets

A U B = {xx in A or x in B}
OR/COMBINED 

Intersection of 2 sets

A ∩ B = {xx in A and x in B}
AND/OVERLAPPED 

x = b

x must be exactly b away from 0 on the number line


x < b

x must be less than b away from 0 on the number line


x > b

x must be more than b away from 0 on the number line
