Please help I need it

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?

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

The graph of y x3 is translated so that the point (1. 1) is moved to (1, 4). what is the equation of the new graph?