Expressions and Equations with Rational Numbers

a statement that the values of two mathematical expressions are equal (indicated by the sign =).

• expression

• coefficient

• numerical expression

• equation

when a number is next to a variable in an equation the operation is

• multiplication

• addition

• depends

• division

can be expressed as the quotient of two integers

• coefficient

• rational number

• dividng

• rations

The image below is a rational algebraic expression.

• True

• False

Classify the given expression as rational algebraic expressions or not rational algebraic expressions.

• rational algebraic expression

• not rational algebraic expressions.

Classify the given expression as rational algebraic expressions or not rational algebraic expressions.

• rational algebraic expression

• not rational algebraic expressions.

The expression below is equal to 1.

• True

• False

Classify the given expression as rational algebraic expressions or not rational algebraic expressions.

• rational algebraic expression

• not rational algebraic expressions.

Brianna’s teacher asks her which of these three expressions are equivalent to each other. Expression A: 9x - 3x - 4 Expression B: 12x - 4 Expression C: 5x + x - 4 Brianna says that all three expressions are equivalent because the value of each one is -4 when x = 0. Brianna’s thinking is incorrect. Identify the error in Brianna’s thinking. Determine which of the three expressions are equivalent. Explain or show your process in determining which expressions are equivalent. Enter your answers and your explanation or process in the space provided.

Enter the value of c when the expression 21x+c is equivalent to 4.1(5x-3.1)

• 13.02

• -13.02

• -3.1

• -7.2