The pictou ferryboat is full when it has ten cars on board. it is also full when it has six trucks on board. the ferryboat never carries cars and trucks at the same time. the ferryboat made five trips across the river and was full on each trip. it carried a total of 42 cars and trucks across the river. how many cars did the ferryboat carry altogether in the five trips? how many trucks did the ferryboat carry altogether in five trips? how many of the trips were with cars? how many trips were with trucks? explain all answers.