Expressions and Equations Review

What is an equation?

• A mathematical statement that asserts the equality of two expressions, typically containing an equal sign (=).

• A formula used to calculate the area of a circle.

• A type of graph that represents data points on a coordinate plane.

• A method for solving inequalities.

Translate: Five more than a number.

• x + 5

• x - 5

• 5 - x

• 5 + x

Evaluate 3x - 7 if x = 12.

• 25

• 27

• 29

• 31

What is a constant in an expression?

• A variable that can change its value

• A fixed value that does not change.

• A mathematical operation

• A type of equation that has no solution.

What is a coefficient?

• A coefficient is a variable in an expression.

• A coefficient is a numerical factor in a term of an expression or equation.

• A coefficient is a constant that does not change.

• A coefficient is a type of equation.

What is a variable in an expression or equation?

• A symbol that represents a known value.

• A symbol (often a letter) that represents an unknown value.

• A constant that does not change.

• A type of equation that has no solution.

What does it mean to simplify an expression?

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

• To make the expression longer and more complex.

• To change the expression into a different variable.

• To eliminate all variables from the expression.

What is the distributive property?

• The distributive property states that a(b + c) = ab + ac.

• The distributive property states that a + b = ab.

• The distributive property states that a(b - c) = ab - ac.

• The distributive property states that a(b + c) = a + b + c.

What does it mean to evaluate an expression?

• To calculate its value by substituting the variables with given numbers.

• To simplify the expression without calculating its value.

• To rewrite the expression in a different form without changing its meaning.

• To find the maximum value of the expression under certain conditions.

What is an expression in mathematics?

• A combination of numbers, variables, and operators that represents a value.

• A single number without any operations.

• A mathematical statement that shows the equality of two expressions.

• A method to solve equations.