The ninth graders are hosting the next school dance. They would like to make at least a $500 profit from selling tickets. The ninth graders estimate that at most 300 students will attend the dance. They will earn $3 for each ticket purchased in advance and $4 for each ticket purchased at the door. PLEASE HELP M

Write a system of inequalities to represent this situation.

Suppose only 30 people buy advance tickets. How many people would need to buy tickets at the door?

Also how do I graph that?

first correct answer gets brainliest

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