HELP MEE I am confused

Mary had at least an 80% on her test write an inequality to represent this situation

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x