Предмет: Математика, автор: margaritacemisova

Розв'яжи задачу
Сплав містить 21% заліза . Скільки кілограмів заліза міститься в 450 кг сплаву.

Ответы

Автор ответа: eremenkosasha07
1

Ответ:

450 сплава/100 процентов*21 процентов железа = 94.5 кг железа

450:100*21=94.5

eremenkosasha07: а почему 4((( Что-то не ясно?
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27. - ___ I go there now?
- No, you ___ .
A) can / hadn’t to B) am / aren’t C) must / needn’t D) might / could
28. Mark will play tennis if he ___ his work in time.
A) finish B) finished C) finishing D) finishes
29. If he ___ ill, he would stay at home.
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30. If he ___ generous, he ___ the poor.
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31. If you ___ to me yesterday, we ___ this article.
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32. If I were you ___ .
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33. I ___ living in England if the weather ___ better.
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34. English grammar is ___ than Russian one.
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35. This is ___ place I’ve ever seen.
A) dirty B) the dirtiest C) more dirty D) dirtier
36. I make ___ mistakes now than last year.
A) few B) fewer C) - D) the fewest
37. The weather is much ___ pleasant than it usually is at this time.
A) most B) more C) the most D) little
38. My luggage was ___ than my friend’s.
A) good B) the best C) many D) less
39. He is ___ among his classmates.
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40. Which bird flies ___, the swallow or the gull?
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41. Vatican is ___ country in Europe.
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42. I enjoy ___ in the garden at week-ends.
A) work B) to work C) to be working D) working
43. Nobody expected him ___ Lola.
A) marry B) married C) to marry D) will marry
44. The inspector is not in the town. He ___ to another place some days ago.
A) was sent B) sent C) will be sent D) will send
45. The business letters ___ tomorrow.
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46. ___ while he was having breakfast.
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47. The party will start ____ Sunday.
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48. This is my friend ____ house is near mine.
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50. Jim asked :" Did you go to work yesterday? Jim asked. ............. to work the day before. A. if had I gone. B. whether I had gone C. if I went D. that I had gone
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27. If people ________ , he will feel bad.
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28. If I had a car, I ________ to the theater.
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29. If they stand up, we ________ see the screen.
A) doesn’t B) won’t be able to C) haven’t to D) aren’t
30. If my car ________ start, I will be late.
A) didn’t B) doesn’t C) don’t D) did
31. I would come if I ________ enough time.
A) had B) have C) will have D) can have
32. He would feel better if he ________ more sleep.
A) got B) gets C) will get D) has gotten
33. You will succeed if you ________ .
A) are trying B) will try C) try D) are going to try
34. ________ long books are interesting.
A) Many B) Many of C) Many the D) Of
35. ________ charming person she is!
A) What B) How C) That D) What a
36. ________ people came than I expected.
A) Other B) Fewer C) Another D) Few
37. I don’t know where ________ .
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C) the post-office D) the post-office is
38. Tom sat near the fire ________ .
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C) for getting warm D) get warm
39. She came ________ because her car had broken down.
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40. She is very fond ________ modern art.
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A) it is difficult B) is difficult C) be difficult D) difficult
42. It is not easy ________ me to tell you what happened.
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44. She felt ill after ________ the food.
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45. I saw somebody ________ towards your house.
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