3x+4y=0 и 2x+3y=1 алгебра 7 класс метод подстановки

основа пирамиды- треугольник со сторонами 5см, 5см, 6см,а все двугранные углы при сторонах основы равняются 60 градусов. найдите длину высоту пирамиды.

2cos^2x=3sinx решите

Скорость африканского страуса 72км\ч .какова его скорость в метрах в минуту?

Change the sentences from reported into direct speech and translate them into Russian.

Model:He says that he doesn’t like to go shopping.— He says, “I don’t like to go shopping. ”

1.Mary tells her friends to leave quickly because her mum is very angry with her.

2.He says that he doesn’t need any fashionable clothes.

3.The shop assistant tells her that she has to wear socks to try the shoes on.

4.She tells her friend that her clothes are out of fashion.

5.She says that she doesn’t like to stand out.

6.Helen says that she is having a great time in Spain.

7.He tells his friends that he doesn’t care about fashion.

8.She says that she prefers casual clothes.