The concession stand at the high school football stadium south hot dogs and hamburgers to raise money for the high school athletic programs each hotdog sold earns the program's $0.50 annie chamber sold earns $0.75 this week the concession stand sold a combination of 230 hot dogs and hamburgers and earned $138.50 for the athletic programs if x represents the number of hot dogs sold and y represents the number of hamburgers sold which system of equations represents this situationa 0.75x + 0.50y = 230 x + y =138.50b 0.50x + 0.75y =138.50 x + y =230 c 0.75x + 0.50y =138.50 x + y =230 d 0.50x + 0.75y =230 x + y =138.50