Which real-world problem is modeled by the equation 5x + 8 = 30.5?

Question

Which real-world problem is modeled by the equation 5x + 8 = 30.5?

1. Asra buys 8 pounds of peanuts and 5 pounds of almonds. She spent $30.50 in all. What is the price per pound of peanuts?  
2. Kate runs the same number of miles every weekday. On Saturdays, she runs 8 miles and she does not run on Sundays. In one week, she runs 30.5 miles. How many miles does Kate run each weekday?
3. Jillian bowls 8 games. She rents shoes for $5. She spent $30.50 in all. How much does each game cost?
4. Shari bought a ticket to a baseball game for $5 and a hot dog and a drink for $8. In all, she spent $30.50 at the ballgame. How much did she spend on parking?  

Answer 1

Kate runs 22.5/5 = 4.5 miles per day each week day

5x + 8 = 30.5

5(4.5) + 8 = 22.5 + 8 = 30.5