кислотные свойства проивляет  каждый из оксидов  ряда;

а)Cr3O5,AL2O3,P2O3

b)Mn2O7,CrO3,V2O3

в)SnO2,SO2,CrO3

u)GeO,MnO2,N2O3

Напишите формулы  гидроксидов,соответствующих оксидами этого ряда

нормы социальных групп

При каких значениях х значения функции :

1) y = - x в квадрате + 8х + 2 больше 9 ;

2) y = 2x в квадрате + х - 6 меньше 4?

Ответьте на вопросы пожалуйста)заранее БОЛЬШОЕ СПАСИБО) 1) What animals, birds, fish can you find in the place where you live? What are their habitats? 2) Do some of them belong to endangered species? Why do you think they have become endangered? 3) Are there any ecological organizations that try to protect suoh animals? How do they help animals? 4) What can you say about the natural habitats of the animals that live in your region? Do you think man can destroy thtir habitats? 5) Do you know any extinct animals? Can you say how they have become extinct? 6) Do you like to go to the zoo? Are there any zoos in the place where you live? What do you think about zoos? Is it really good to keep animals in cages? Do zoos help animals to survive? 7) What plants grow in the place where you live? Do people cut down many trees there? Do they plant new trees? How iong do you think it will take a small tree to become tall and big? Why is it dangerous to have few trees and flowers in the forests and fields? 8) Why do you think people begin to discuss ecological problem more seriously nowadays?