Jack is trying to make extra money on his summer vacation from school. He works two different jobs, earning $9 per hour washing cars and $6 per hour walking dogs. How much money would Jack earn in a week in which he worked 5 hours washing cars and 2 hours walking dogs? How much money would Jack earn in a week in which he worked w hours washing cars and d hours walking dogs? Model Contexts with Two Variable Expressions question 5 hours washing cars and 2 hours walking dogs: ? w hours washing cars and d hours walking dogs:?