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The question in the image is asking whether Marcus correctly solved the system of linear equations related to ticket prices for adults and students. He found that each student ticket was $12 and each adult ticket was $9.

- **A** claims Marcus solved the system correctly and agrees with the prices he found.
- **B** says Marcus swapped the prices, implying the correct prices should be $16 for adult tickets and $9 for student tickets.
- **C** states Marcus mixed up the variables, indicating adult tickets should be $12 and student tickets $9.
- **D** suggests Marcus incorrectly solved the system but with the same prices as in the original question, though the reasoning is reversed.

Answer **A** is selected as correct, meaning the question is stating that Marcus did indeed set up and solve the system of equations properly, and his findings that student tickets are $12 and adult tickets are $9 are correct.

Would you like details on how systems of equations are used to solve such problems? 

Here are 5 related questions to consider:
1. How do you set up a system of linear equations for ticket pricing problems?
2. How do you determine whether a solution to a system of equations is correct?
3. What are common errors when solving systems of equations?
4. How can you check your solution when solving for multiple variables?
5. How do variables represent real-world quantities in systems of equations?

**Tip**: Always double-check your equation setup to make sure variables correspond to the correct quantities.

Marcus wrote a system of linear equations to find the price for each adult and student. He found that each student ticket was $12 and each adult ticket was $9. Is Marcus correct?

Explore how to solve a system of linear equations to find ticket prices for adults and students. This problem demonstrates solving using algebraic methods and checking the correctness of the solution, suitable for Grades 8-10.

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