Предмет: Алгебра, автор: noname8126

15x^2+21x=0 помогите с уравнением ставлю максимум балов

Ответы

Автор ответа: alina862073

С Дискриминантом решать???

noname8126: нет

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1. Listen! The birds _________ so beautiful!

a sing b sings c are singing d sang

2. Is there _______ milk left in the fridge?

a some b any c a d many

3. I can`t believe that Helen can do it _________.

a herself b myself c himself d yourself

4. It's the __________ film I've ever seen.

a. funniest b. funnier c. more funny d. most funny

5. The boy______ father is a dentist is my friend.

a who b when c whose d which

6. I went to Berlin two years _______.

a for b yet c last d ago

7. She can't drive, __________?

a. isn't she b. can she c. does she d. has she

8. Jack_______ a new digital camera. He is very happy!

a buys b bought c has bought d was buying

9. I ________ my homework, when my mum came to the room.

a. do b did c have done d was doing

10. If it rains, people _______ umbrellas with them.

a take b takes c will take d took

11. I haven't finished my project __________ .

a. just b. yet c. before d. already

12. His grandpa _____________ in this factory for 30 years.

a. works b worked c have been working d has been working

13. Who is ____________ pupil in your class?

a. the cleverer b the cleverest c clever d the most clever

14. Our dad speaks French very well, ________ ?

a. doesn’t he b didn’t he c hasn’t he d isn’t he

15. I am very good at Maths, ________?

a. am not I b aren’t I c don’t I d. do I

16. Where ______ you go last week?

a. have you gone b are you going c do you go d did you go

17. Mary and Joe went to the museum ________.

a themselves b ourselves c yourself d himself

18. I have __________ seen this film twice. Let's watch something else.

a. never b. already c. just d. ever

19. You ________ go to bed so late. You have a test tomorrow.

a. should b shouldn’t c must d can’t

20. If I meet Jane, I ______ her to the party.

a invite b invites c invited d will invite

21. I’m hungry… I _______ the café.

a. go b. goes c. will go d. went

22. It often _______ in our city.

a. rain b. rains c. is raining d. rained

23. She has known him __________ 1996.

a. since b. from c. for d. already

24. Russia is _________ than any other country.

a. large b. largest c. larger d. more large

25. Where are you? I _________ since 5 o’clock!

a. am waiting b. have waited c. waited d. have been waiting

26. You _________ work hard to pass exams well.

a. should b. shouldn’t c. mustn’t d. can

27. 25th of April is the date, _______ I was born.

a. which b. where c. who d. when

28. He has been an actor __________ twenty years.

a. last b. for c. already d. yet

29. Can I have _______ juice, please?

a. any b. some c. many d. a few

30. We are going to travel to Paris next month, _____?

a. are we b. aren’t we c. don’t we d. are you