An expression is a set of terms combined using the operations +, – , x or \( \div\), for example \(4x − 3\) or \(x^2 – xy + 17\). An equation states that two expressions are equal in value ...

A mathematical proof is a sequence of statements ... If \(n\) is an integer (a whole number), then the expression \(2n\) represents an even number, because even numbers are the multiples of ...