на одно окно требуется 3 одинаковых стекла. Сколько окон можно застеклить, если есть 10 таких стёкол? 20 стёкол?

Решите неравенства!!!

1) (2x+3)(2-x)>3

2) x(3x-2.4)>0

3) (0.2-x)(0.2+x)<0

You have got a letter from your English-speaking pen friend Steve ... Next year i will go to the sixth from where i will learn Math,informatoin Technology,English and two more subjects-which ones,i haven't decided yet.I want to get into Oxford.It is rather difficult and you need to work hard. What opportunities do you have when you choose where to study?What are your plans for the future?What subjects are you interested in? Write a letter to Steve and answar his quetions.Ask him three questions about Bretish cshools.You have 20 minutes to do this task.Write 100-140 words. Вообщем,тут надо написать письмо и ответить на вопросы!)

стенной шкаф имеет высоту 1,8м.его глубина состовляет 30% высоты.а ширина 250% глубины.найдите объем шкафа.