Two plumbers charge different rates for service. The first plumber charges $100 per service call plus $25 per hour of service. The second plumber charges $50 service call plus $50 per hour of service. After how many hours do the plumbers charge the same amount?

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

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?

If a || b and e || f , what if the value of y ?