The entrance fee to a National Park is $7. A campsite fee is $12 per night. Which equation best represents the total cost y for a camping trip x nights -and if you can, can you tell me how you got your answer

Acafeteria manager can choose from among six side dishes for the lunch menu: applesauce, broccoli, corn, dumplings, egg rolls, or french fries. he used a computer program to randomly select three dishes for monday's lunch. what is the theoretical probability the applesauce and broccoli will both be offered monday?