Pre-Algebra Unit 2 Vocab

A number and/or variable separated by +/- symbol 

Example: 4x + 5 - 7x² - x

• Constant

• Coefficient

• Exponent Form

• Term

A mathematical sentence that involves numbers, variables, and/or operation symbols and NO equal sign 

Example: 4x , 7y - 2(5)²

• Algebraic Expression

• Numerical Expression

• Expression

• Equation

The value in front of the variable. The value is ALWAYS multiplied by the variable 

Example: 5x - 4 = 11

• Variable

• Coefficient

• Product

• Distributive Property

A mathematical sentence that DOES have an equal sign 

Example: 4x = 5x - 8            3 = 7y - 2

• Expression

• Equation

• Quantity

• Solve

A mathematical sentence that DOES NOT have an equal sign

Example: 4x , 5(4+7) - 3²

• Equation

• Expanded form

• Expression

• Evaluate

What is the difference between an expression and equation?

• Expressions have an equal sign and equations do not have an equal sign
• Expressions do not have an equal sign and equations do have an equal sign
• There is not a difference
• Expressions do not have variables and equations have variables

Define variable

• a letter in the alphabet

• a letter or symbol standing for an unknown value

• a letter to grandma

• a letter to Santa

Define constant.

• the number multiplied by a variable

• to replace a value for a variable

• a number standing alone

• to find the value of an expression

Select the constant in 8x - 2.

• 8

• 8x

• 2

• -2

2x + 3y + 5x = 75

• coefficeient
• constant
• terms
• variables