Expressions and Equations

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing one or more variables, such as 6x² + 10 = 25.

Front

What is the perimeter of a triangle with side lengths 2x, 3x + 5, and x + 2?

Back

The perimeter is represented by the expression 6x + 7.

Front

What do you call each part of an expression that is separated by a + or a - sign?

Back

Each part is called a term.

Front

What does a variable mean in mathematics?

Back

A variable is a letter or symbol that stands for an unknown value.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (like + and -) that represents a value, such as 8z + 2.

Front

What is a coefficient?

Back

A coefficient is a numerical factor in a term of an expression, such as the 5 in 5x.

Front

What is a constant in an expression?

Back

A constant is a fixed value that does not change, such as the number 7 in the expression 3x + 7.

Front

What is a term in an expression?

Back

A term is a single mathematical expression that can be a number, a variable, or a combination of both, such as 4y or 3.

Front

How do you simplify the expression 2x + 3x?

Back

You combine like terms to get 5x.

Front

What is the difference between an expression and an equation?

Back

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