Algebra Word Problems

1. Define what an algebraic expression is in your own words, and explain how it can be used to represent a real-world scenario.

2. A phone company charges a flat fee of $25 per month plus $0.10 for each text message. Write an algebraic expression to represent the total monthly cost if a customer sends 't' text messages.

3. Sarah baked a batch of cookies. She gave 12 cookies to her friend and now has 'c' cookies left. Write an equation to represent the original number of cookies Sarah baked.