"I need to cook the soup and wash the dishes."
Translation:Мне надо сварить суп и помыть посуду.
Then why was it not stated in the line to be translated as 'boil'. So far on this course for 'to cook' we have been готовит-ing, now suddenly we are сварит-ing. There is no need for this confusion. We should have been asked to translate "I need to boil the soup and wash the dishes.".
No. Plate refers to a specific type or a few closely related types of dishes - the basic idea is large, round and fairly flat, used for serving food. Dishes is broader - it includes plates but also any kind of container for serving or cooking, when you talk about washing the dishes that also probably includes cups/glasses and silverware.