(2) Henry has 50 apples. He gives 4 apples each to \( f \) friends. What is the difference in the expression \( 50-4 f \) ? What does the difference represent?

The expression \( 50 - 4f \) represents the number of apples Henry has left after giving away \( f \) friends 4 apples each. For instance, if Henry has 5 friends, he would give away \( 4 \times 5 = 20 \) apples, leaving him with \( 50 - 20 = 30 \) apples. The difference \( 50 - 4f \) not only showcases how Henry's apple supply decreases with each friend he gifts apples to, but it also illustrates the concept of subtraction in a real-world scenario. The flexibility of \( f \) allows you to explore various situations, from sharing apples with one friend to many, making it a fun way to engage with basic algebra!