Someone me with this one question

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

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?

Graph the linear function using the slooe and y intercept