$A=42.(-53) + 47 .(-156) + (-114).(-47)$
$=42.(-53)+47.(-156+114)$
$=42.(-53)+47.(-42)$
$=42.(-53-47)$
$=42.(-100)$
$=-4200$
A=42.(-53)+47.(-156)+(-114).(-47)
=42.(-53)+47.(-156+114)
=42.(-53)+47.(-42)
=42.(-53-47)
=42.(-100)
=-4200.
III. Choose the correct option A, B, C or D to complete the sentences. (2,5ps) 1. ______ the traffic was bad, I arrived on time. A. Despite B. In spite of C. However D. Although 2. It takes me two hours___________ that letter. A. to write B. write C. writing D. for writing 3. I’m tired of _______ nothing to do at home. A. to have B. have C. having D. had 4. Please tell him to ______ the light. It is getting dark. A. turn on B. turn up C. turn over D. turn off 5. I am sure I locked the door. I clearly remember ______ it. A. to lock B. to have locked C. locking D. lock 6. We didn’t go out ______ it was raining. A. although B. because C. in spite of D. despite 7. An is a hard-working student. I think An___________ pass the exam easily. A. would B. has C. was D. will 8. In order to save energy, don’t forget to ______ the lights before you leave. A. turn B. turn on C. turn off D. turn of 9. The energy consumption__________ as much as possible. A. will reduced B. will be reduced C. be reduced D. reduced 10. My father ______ a lot last year but this year he doesn’t any more. A. used to smoke B. smokes C. gets used to smoke D. smoking I. Read the passage and tick () True or False. (1,5ps) Energy is one of the problems that many people are interested in. It is not an unfamiliar word. It is heard, said, discussed day after day. It is close to everyone’s daily life. You turn on a lamp and it is energy that gives you light. You turn on a TV and it is energy that gives you pictures and sound. You ride a motorcycle and it is energy that gives you movement. You cook your meals and it is energy that gives you heat to boil rice. The problem is that the demand for energy is rising and that the price of energy is getting higher and higher. The supply of energy on earth is limited. It cannot provide us forever. The shortage of energy in the future is inevitable. Therefore, saving energy is a must if we want to continue to live in a safe and sound world. * Notice: familiar: thân thuộc demand: nhu cầu inevitable: chắc chắn xảy ra Statements True False 1. Many people aren’t interested in the problems of energy. 2. The word “energy” is familiar and close to everyone’s daily life. 3. Energy is heard, said, discussed day after day. 4. We can’t watch TV without energy. 5. The supply of energy on earth is unlimited. It can provide us forever. 6. If we want to continue to live in a safe and sound world, we have to save energy
Giải gấp câu trắc nghiệm này vs mn ơi!!!Thanks mn nhiều!!!{50₫}
viết đoạn văn ngắn trình bày suy nghĩ về câu nói: khi chia sẻ một nổi buồn, chúng ta sẽ không buồn hơn, nhưng người khác lại vui hơn
làm bài 3 vs 4 thôi nhé gấp!!!!!!!!!!!!!! giúp mik vs mik cảm ơn
Nguyên tố A có điện tích hạt nhân 19+,có 4 lớp e,lớp ngoài cùng có 1e. Xác định vị trí và dự đoán tính chất của A ,A có tính chất tương tự Na. Viết PTHH
Giải phương trình cách nhanh nhất hộ iêm ạ: a) (3x-2).(9x^2+6x+4)-(3x-1).(9x^2-3x+1)=x-4 b) x.(x-1)-(x-3).(x+4)=5x c)(2x+1).(2x-1)=4x.(x-7)-3x
tổng của 2 số tròn chục liền trước số 73, nếu tăng số hạng thứ nhất lên 5 đơn vị và giảm số hạng thứ 2 đi 6 đơn vị thì tổng mới là bao nhiêu?
1. you/ school/ at/ Are/ now/ ? 2. lessons/ How/ you/ do/ today/ many/ have/ ? 3. four/ Vietnamese/ a/ He/ week/ times/ has/ . 4.Do /your /you/ free /read /books /in /time/?/ 5. in / We/ study / pas t/ and / present / in /events /Vietnam/ and in /the /world/ history . 6. You /it/ have/ this / book /I /when /can /finish/. 7.. study/ I/ a/ twice/ with/ week/ partner/ a/ . 8. English / English magazines / by / reading / learns/ to / read / Tuan/. 9. parents/ My/ in / live/ small/ in / a / the / village / countryside/ in . 10. Except/ He/ to / goes / and/ Saturday / school / Sunday /. 11. read/ We/ stories / short/ write/ and / essays / during/ Vietnamese/ lessons . 12.write/ I / words/ new/ learn / and/ meaning/ their/ sentences / in . 13. of/ Snow White / is/ the/ main / story / character / the . 14. rode/ He/ a horse/ used/ and/ bamboo/ fight/ to / against / enemies/ the . 15. monkeys/ The/ jumped/ down / up / and / the/ on / trees . 16. practice / I / listening/ by / English / watching / cartoons/ TV / on. 17. He/ had/ a / party / big/ at / house’s / Nga / 18. His/ went/ family/ back / their / to / hometown / coach / by . 19.She / often / online/ chats / her / friends / in / Viet Nam /with. 20. They / back / came / late / evening/ the / in .
Chất nào sau đây không dùng để điều chế khí oxi? A: KClO3 . B: KMnO4 . C: CO2 . D: H2 O.
Cho 50 gam hỗn hợp gồm Al, Mg và Zn tác dụng vừa đủ với V lít khí O2 (đtkc). Sau phản ứng thu được 74 gam hỗn hợp sản phẩm. Thể tích khí oxi (đktc) đã tham gia phản ứng với hỗn hợp trên là A: 11,2 lít. B: 13,44 lít. C: 16,8 lít. D: 22,4 lít.
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