Introduction to Expressions and Equations

A letter or symbol that represents an unknown value is called ______________.

• Variable

• Radicand

• Coefficient

• Constant

What do we call a number sentence that has an equal sign?

• expression

• solution

• equation

• constant

What is the most important difference between an expression and an equation?

• they're spelled different

• an equal sign

• only equations have variables

• only expressions have variables

What are inverse operations?

• Absolute values

• Opposite operations used in isolating a variable

• Operations used for only inequalities

• Unknown quantity represented by a letter or symbol

Two or more terms that contain the same variables(s), with corresponding variables raised to the same power. In other words, terms that are "like" each other.

• inequality

• expression

• equivalent

• like terms

Two expressions that have the same value.

Example 2 + 3=5 and 4 + 1=5

• evaluate

• equivalent

• expression

• expand

is a combination of individual terms separated by plus or minus signs.

• equation

• evaluate

• expand

• expression

A ____ to an equation gives the value(s) of the variable that makes the equation true

• solution

• simplify

• variable

• constant

________is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent it.

• variable

• coefficient

• simplify

• constant

You will often be asked to put something "in simplest form"

• constant

• solution

• simplify

• integer