1 / 5

EXPRESSIONS

EXPRESSIONS. Vocabulary A variable is a symbol, usually a letter, used to represent a number. Example: 4x (x is the variable) A coefficient is the number factor of a term that contains a variable. Example: 4x (4 is the coefficient) A constant is a term without a variable. Example: 5

aletta
Download Presentation

EXPRESSIONS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. EXPRESSIONS

  2. Vocabulary • A variable is a symbol, usually a letter, used to represent a number. • Example: 4x (x is the variable) • A coefficient is the number factor of a term that contains a variable. • Example: 4x (4 is the coefficient) • A constant is a term without a variable. • Example: 5 • A term of an expression is a number, variable, or the product of both. • Example: 4x + 7 (4x is a term, and 7 is a term)

  3. Vocabulary • An expression is a mathematical phrase that can contain variables, numbers and/or symbols. • Example: 4x + 7 • An algebraic expression is an expression that contains a variable, a number, and at least one operation symbol. • Example: 4 + x • When you substitute a number in for a variable, the algebraic expression becomes the numerical expression. • Example: 4 + x, x = 5 4 + 5

  4. EvaluatingExpressions • To evaluate an algebraic expression, replace the variable or variables with the known values and then use the order of operations. • Example 1: Evaluate the following expression if a=5, b=4, and c=8. 4a – 3b + 1 4(5) – 3(4) + 1 20 – 12 + 1 8 + 1 9

  5. Example 2 • Evaluate the following expressions if m = 9, n = 2, and p = 5. 1. 25 – 5p 2.3. n² + 5n - 6 25 – 5(5) 25 – 25 0 29 (2)² + 5(2) – 6 4 + 10 – 6 14 – 6 8

More Related