Evaluate Expression With Variable

a letter that represents an unknown value

• evaluate

• equivalent ratios

• variable

• substitution

• expression

replacing a variable with a number or expression

• equivalent fractions

• substitution

• evaluate

• equivalent expressions

• similar figures

• n = 7

• n = 15

• n = 17

• n = 23

• n = 3

• n = 4

• n = 5

• n = 10

An expression with variables. DOES NOT HAVE AN EQUAL SIGN.

• Term

• Algebraic Expression

• Numeric Expression

• Equation

A symbol for a value we don’t know yet. An unknown.

• Variable

• Term

• Symbol

• Number

A number in front of, and multiplying, a variable. A value that can change based on the variable (it changes when multiplied by the variable).

• Coefficient

• Symbol

• Constant

• Variable

Define evaluate.

• the number multiplied by a variable

• to replace a value for a variable

• a number standing alone

• to find the value of an expression

Define substitute.

• the number multiplied by a variable

• to replace a variable with a value or an expression

• a number standing alone

• to find the value of an expression

Select the coefficient in 8x + 2.

• x

• 8x

• 8

• +2