Giải

 Sau khi mua váy, bạn chắc chắn còn 3.000 tiền thừa. Bạn gửi trả bố 1.000, trả mẹ 1.000 nên chỉ còn nợ mỗi người: 50.000 - 1.000 = 49.000, tổng cộng nợ bố và mẹ: 49.000 + 49.000 = 98.000. Và bạn còn 1.000 tiền thừa.

Đến đây:

- Nếu bạn đưa nốt 1.000 cho bố hoặc mẹ thì bạn chỉ còn nợ bố và mẹ: 98.000 - 1.000 = 97.000 - bằng giá trị cái váy bạn mua.

- Nếu bạn giữ lại 1.000 và 97.000 giá trị cái váy sẽ có tổng là 98.000, bằng số tiền nợ bố mẹ

Do đó, bạn sẽ không bị mất đồng nào.

222+3=225

UNIT 10: SOURCES OF ENERGY

I. Choose the correct answers.
1. The wind, the sun, and the wave are some types of……………..sources of energy.
A. changeable B. alternative C. cheap D. costly
2. Remember to……………the lights before going to bed.
A. turn B. turn on C. turn off D. stop
3. By the middle of 21st centery, people indeveloping countries………....more renewable energy.
A. uses B. will be using C. used D. have used

=> Đáp án khác: will have used ( tương lai hoàn thành) vì có by+ mốc thời gian trong tương lai
4. Fossil fuels are very common in our society but they...……the environment.
A. renew B. provide C. waste D. pollute
5. Serveal governments try to………….the use of fossil fuels.
A. reduce B. increase C. waste D. save
6. We should put…………….on our roof for the heating and hot water.
A. solar energy B. equipment C. cracks D. solar panels
II. Complete the sentences with the correct form of the words in brackets.
1. I …don't study…..( not study) this evening. Do you want to go out?
2. My brothers and I……will not camp….(not camp) this week. We will be too busy studying for exams.
3. My friend……is practicing….(practice) for the TOEFL exam over her summer vacation.
4. At this time tomorrow, what…will…..you…be doing…..(do) ?
5. Next week, I……will drive…..(drive) from Hanoi to Danang. You won’t
Able to contact me for a couple of days.
6. Please don’t call me after 11 p.m. I……will be sleeping……(sleep).
7. Tomorrow, I…will sit…..(sit) in the same seat that I am sitting in now.
8. I……will not travel….(not travel) with my brother through Europe because I don’t have enough money.
9. My brother…hasn't got….(not get) married any time soon. He
Has no job and he doesn’t seem to want to do anything.
10. We……will be riding……..(ride) our bicycle around Hoan Kiem Lake from 6 a.m to 8 a.m tomorrow.
III. Change the sentences into the passive voice.
1. Scientists anticipate that people will use up fossil fuels by 2052.
( It is anticipated that fossil fuels……will be used up by 2050……...
2. Solar energy will replace most of fossil fuels in the future.
( Most of fossil fuels…will be replaced by solar energy in the future ……..
3. We will minimize the use of electricity to save our energy.
( The use of electricity……will be minimized to save our energy ……...
4. Human will use the sun as the biggest energy source for the future.
( The sun……will be used as the biggest energy source for the future by humane ……
5. Space-based solar power will allow us to work around these challenges.
( We…will be allowed to work around these challenges by space-based solar power……...
6. Government will make more regulations to reduce industrial pollution.
( More regulations…will be made to reduce industrial pollution by government …..
7. Scientists will find solutions to reduce pollution in our country.
( Solutions…will be found to reduce pollution in our country by scientists……..
8. People will construct more wind turbines in that area to produce electricity.
( More wind turbines…will be constructed in that area to produce electricity…….

Câu 1 . Rewrite the following sentences beginning with the words provided

1. All the students choose him the monitor

=> He ....is chosen to be the monitor by all the students .....

2. They will give her a prize if she studies well

=> She ......will be given if she studies well.....

3. We had thought carefully before we gave our decision

=> Before our decision ......we had thought carefully ....

4. How do you spend this amount of money ?

=> How is ....this amount of money spent?........

5. They have scored more than ten goals in the season

=> More than .......ten goalshave been scored in the season .............

6. They have given many talks on history and development of May Day

=> Many talks .........on history and development of May Day have been given.......

7. The clowns made the audience laugh a lot

=> The audience ...was made to laugh a lot by the clowns..

8. They say thay he buit this house for sale

=> This house .......is said to have been built for sale.

9. He had someone repair his roof yesterday

=> He had his roof .....repaired yesterday ....

10. I need to polish my shoes

=> My shoes need ......polishing..........

Bạn đừng tưởng tượng nữa  naruto uzumi

Ô tô đi trước xe máy số thời gian là:

8 giờ 30 phút-8 giờ=30 phút=1/2 giờ

Quãng đường ô tô đi trước xe máy là:

48x1/2=24(km)

Quãng đường còn lại để ô tô đi đến B là:

102-24=78(km)

Tổng vận tốc 2 xe là:

48+30=78(km/giờ)

2 xe gặp nhau sau:

78:78=1(giờ)

Vậy 2 xe gặp nhau sau:

8 giờ 30 phút+1 giờ=9 giờ 30 phút

Đáp số: 9 giờ 30 phút

OLM duyệt giùm em đi ạ!

\(\left(x-1\right)^5=-243\)

\(\left(x-1\right)^5=-243\)

\(\left(x-1\right)^5=\left(-3\right)^5\)

\(x-1=-3\)

\(x=-3+1\)

\(x=-2\)

là số thập phân lặp đi lặp lại ở phần thập phân

3*4=12

k cho mk nhé

diện tích HCN là

12x9=108 m2 = 10800 dm2

diện tích 1 viên gạch là

3x3=9 dm2

cần số viên gạch là

10800:9=1200 viên