Arectangle has a length of a cm and a width which is half of the length. given that the rectangle as a perimeter of 240 cm, write down an expression in terms of a for the perimeter of the rectangle, and find the length of the rectangle.

More than 450450 students traveled to a state park for a field trip. the school allowed 66 students to travel by car, and the rest traveled on 1111 buses, each of which held the same number of students. if there were ss students in each bus, which inequality best represents this situation?