Algebra Vocabulary SOL 6.23. Coefficient A coefficient is the numerical factor in a term. –Example: in the term 4x, 4 is the coefficient. If the coefficient.

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Presentation transcript:

Algebra Vocabulary SOL 6.23

Coefficient A coefficient is the numerical factor in a term. –Example: in the term 4x, 4 is the coefficient. If the coefficient is not written, it is 1 –Example: in the term d, 1 is the coefficient.

1. Circle the coefficient 3x4y5a7ba1

A variable is a symbol (placeholder) used to represent an unknown number. –E–Example: in the term 4x, x is the variable Variable

2. Circle the variable 3x4y5a7ba

Term A term is a number, variable, product or quotient in an expression of sums and/or differences. Terms are separated with a + or – sign. –Examples: w53w y / 8

How many terms are there? 7x 2 + 5x - 3 There are 3 terms!

3. Indicate the number of terms in each expression 2x + 1_____ 3b_____ 5a - 25_____ a / 6 _____ y / – 7_____ 4d – 6 _____

Inverse operations are operations which undo each other. 4. Examples: Addition and _____________ are inverse operations Multiplication and _________ are inverse operations Inverse Operations Subtraction Division

Expressions An expression can be a term or a collection of terms separated by addition or subtraction signs. Expressions do not include an equal sign! Examples : 2x + 1 3y

Equations An equation is a mathematical sentence stating that two expressions are equal. –Example: The expressions are equal to one another. 2x + 14=

5. Expression or Equation? A.4d – 6 B.3x = 6 C.3b D. a / 6 E. y / = 7 Expression Expression Expression Equation Equation