Algebra 2 quiz (1-1, 1-2, 1-3)
Variable
symbol, usually letters, used to represent unknown quantities
Irrational numbers
A real number that is not rational. The decimal form neither terminates nor repeats. Designated by the letter I.
Integers (Z)
....... -3, -2, -1, 0, 1, 2, 3, ........
Whole (W)
0, 1, 2, 3, .......
Natural (N)
1, 2, 3, 4, .......
Associative (real number property)
Addition: (a+b)+c = a+(b+c) Multiplication: (axb)xc = ax(bxc)
Inverse (real number property)
Addition: a+(-a) = 0 = (-a)+a Multiplication: If a doesn't equal 0, then a x 1/a = 1 = 1/a x a
Identity (real number property)
Addition: a+0=a=0+a Multiplication:a x 1 = a = 1 x a
Commutative (real number property)
Addition: a+b = b+a Multiplication: axb = bxa
Real Numbers
All numbers used in everyday life; the set of all rational numbers and irrational numbers. Designated by the letter R.
Rational numbers
Any number m/n, where m and n are integers and n is not zero. The decimal is either terminating or repeating numbers. Designated by the letter Q.
Distributive (real number property)
a(b+c) = ab+ac (b+c)a = ba+ca
Algebraic Expression
expressions that contain at least one variable