Interpreting parts of an expression

Question

Lean works as a welder and web designer. As a welder she earns $18 per hour. Last week she worked x hours as a welder and her friend paid her $75 to design a web page. Write an expression to represent the total amount lean earned last week

Answer 1

Since Lean earned 18 per hour for x hours, she earned 18x from welding. When you see the word "per", think multiplication. She earned an additional 75 for the web page - think addition. Thus the expression for the total is:

18x + 75