L1-6 Notes: Algebra: Variables and Expressions

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Presentation transcript:

L1-6 Notes: Algebra: Variables and Expressions Chapter 1 L1-6 Notes: Algebra: Variables and Expressions

Vocabulary ALGEBRA - a language of symbols. VARIABLE - a symbol, usually a letter, used to represent a number. ALGEBRAIC EXPRESSIONS - are combinations of variables, numbers, and at least one operation. EVALUATE – to find the value of the algebraic expression.

Other ways to express multiplication 2 ∙ 3 = 2 × 3 4(5) = 4 × 5 5t = 5 × t st = s × t

Examples Evaluate each expression if m = 4 and z = 9. 3 + m z – m

Examples Evaluate each expression if a = 2, b = 5, and c = 7 4c – 5 + 3 6a ÷ 3 + 4 10 + 6b × 3