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