Report that the science club earned $20 more than twice what it earned last year is not necessarily easy to understand, right? Writing this as an algebraic expression could help. A mathematical expression is a collection of numbers and operations arranged in a meaningful order. An algebraic expression is a mathematical expression that contains one or more variables. Here are some examples:

Mathematical expression:
Algebraic expression: P(1 + r)n
What do these expressions have in common? What are their differences?