Carla bought a digital camera that cost $91.98. she also bought 2 identical memory cards and a camera case. the camera cost 6 times as much as the case. she paid $127.35, including sales tax of $6.06. what was the cost of each memory card?

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your