Mr. martin and his son are planning a fishing trip to alaska. the rates of two companies are shown.

wild fishing inc.
round trip flight $200 / daily rate $25
fisherman's service
round trip flight $150 / daily rate $30

part a : which company offers a better deal for a three day trip for mr. martin and his son? what will be the cost?
part b : which company would charge $700 for 6 days for both of them?
part c : write an expression to represent the cost of the trip for mr. martin and his son for each company.