пищевые цепи: кенгуру, коала,белка,песец,лев,зебра,лемминг,куница,эвкалипт,трава,шишки ели.

Предмет находится на расстояние 6 м от оптического центра двояковогнутой линзы с фокусным расстоянием 2м. Определите, на каком расстоянии от линзы находится изображение предмета

12 целых 7/23- ( 6 целых 18/23-t) =  3 целых 21/23+ 5 целых 19/23

Переведите плиззз:

Andriy: Hi, Olia! Any news from our partner school in Great Britain?
Olia: Hello, Andriy! We got a letter from them yesterday. They have launched the UNESCO World Heritage Project in their school and invite us to participate in it, too.
Andriy: I've heard about UNESCO. The abbreviation stands for the United Nations Educational, Scientific and Cultural Organization. It promotes international co-operation among the countries in the fields of education, science, culture and communication. Am I right?
Olia: Yes, you are right.
Andriy: What sites have they chosen for their project?
Olia: They have decided to write about the sites in Ukraine and we have to choose the sites from the UK.
Andriy: Oh, I see. The project will help us know both countries better.
Olia: This is what the projects exist after all. They help us learn more about the world and people who live in it.