Help with these 2 pls and i’ll give brainliest !<3

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

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.