Expressions and Equations

Identify the constants in the expression 3 + 4x - 2x + 5.

• 3 and 4

• 3 and 5

• 4 and 5

• 2 and 3

What is the difference between an expression and an equation?

• An expression has an equality sign, while an equation does not.

• An expression is a mathematical phrase, while an equation is a statement of equality.

• An expression can only contain numbers, while an equation can contain variables.

• An expression does not have an equality sign, while an equation does.

What is an expression?

• A combination of numbers, variables, and operators without an equality sign.

• A mathematical statement that includes an equality sign.

• A single number or variable without any operations.

• A formula that only contains constants.

Evaluate using correct order of operations: 16 - 4(7 + 1) ÷ 2²

• 6

• 8

• 10

• 12

What is a coefficient?

• A numerical factor in a term of an expression.

• A variable that represents a number.

• A constant that does not change.

• An equation that shows equality.

What is a constant?

• A variable that can change over time.

• A fixed value that does not change.

• A type of equation that has no solution.

• A measurement that varies with conditions.

Identify the variable(s) in the expression 5x + 1 + 3x² + 7.

• 5 and 1

• x and x²

• 3 and 7

• x² and 1

Which phrase matches the expression y - 6?

• A number, y, decreased by 6.

• A number, y, increased by 6.

• A number, y, multiplied by 6.

• A number, y, divided by 6.

What is a term in an expression?

• A single mathematical expression that can be a number, variable, or the product of numbers and variables.

• A collection of numbers and symbols that represent a mathematical relationship.

• An equation that shows the equality of two expressions.

• A graphical representation of a mathematical function.

What does simplifying an expression mean?

• To combine like terms and reduce the expression to its simplest form.

• To make the expression longer and more complex.

• To change the variables in the expression.

• To evaluate the expression to find its numerical value.