Перейти к выбору ответа 02.04.20222cos 60 градусов +1 Выбрать другой вопрос Смотреть ответ Перейти к выбору ответа Математика Вопрос школьника по предмету Математика 2cos 60 градусов +1 Ответ учителя по предмету Математика 2cos(60¤) + 1; По таблице Брадиса cos(60¤) = 1/2, отсюда: 2 * 1/2 + 1 = 1 + 1 = 2 Ответ: 2
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(А+523)•306=290700
а) останется в покое
б) всплывёт
в) утонет
г) будет совершать колебательные движения
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21. Rewrite the sentences in the interrogative and negative form.
1)She has to do these exercises again/
2)We had to work hard to learn how to solve such problems.
3)He’ll have to answer her letter without any delay.
4)You have to speak louder to make yourself heard.
5)They had to repeat their experiment.
6)I’ll have to work from morning till night to earn my living.
7)She’ll have to give a talk at the next seminar.
8)We had to change the plan for the experiment/
9)We’ll have to put it off till next time.
22.Answer these questions/ Use the words suggested.
Example Why didn’t you stay longer? (go home)
-I had to go hame.
1)Why didn’t you come to see us? (write an essay)
2)Why didn’t John ride his bicycle? (repair it)
3)Why didn’t the meet us (look after? Granny)
4)Why didn’t the children play football? (stay at home)
5)Why didn’t Ann learn the poem? (translate the text)
6)Why didn’t she come back in time? (call on her sick friend)
7)Why didn’t she go to the cinema? (do a lot of work about the house)
8)Why didn’t he meet his friends? (go on a business trip)