Làm giúp mình mấy câu còn thiếu nka mình cảm ơnnn
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TX
1
Những câu hỏi liên quan
NN
1
15 tháng 12 2022
a: x=3/4-1/3=9/12-4/12=5/12
b: 1/3x=2/3-5/9=6/9-5/9=1/9
=>x=1/3
c: =>3x=6/5-3/4-7/4=6/5-5/2=12/10-25/10=-13/10
=>x=-13/30
d: =>x+2/5-2/3=5/3
=>x=5/3+2/3-3/5=7/3-3/5=35/15-9/15=26/15
e: =>1/4:x=2/5-3/4=8/20-15/20=-7/20
=>x=-1/4:7/20=-1/4*20/7=-20/28=-5/7
f: =>1/4x-3/4=1/2-25/4=2/4-25/4=-23/4
=>1/4x=-20/4
=>x=-20
K
30 tháng 6 2021
21. Tinh told Lien that she might go shopping with her friends
22. Bao said he had to do more grammar exercise
23. The girl said they ought to finish their homework that night
24. The leader of the group said that they would play with their best to win the prize for their school
26. The coach told the players to train harder for the next match
27. Tam's sister told him to help her to clean the house
28. Hoa's parents said that they would visit her that summer
30. Mary told her friend that she would expect to see him/her the next Wednesday
DN
Giúp mình với ạ, mình cảm ơnnn
1
giúp mình với, mình đang cần gấp, mình cảm ơnnn
DT
Đỗ Thanh Hải
CTVVIP
23 tháng 3 2021
3 C
4 B
5 A
6 B
7 A
8 A
9 C
10 D
11 B
12 B
13 A
14 C
15 B
16 A
17 D
18 D
19 C
20 A
21 B
22 B
23 C
24 D
25 B
26 D
27 A
28 D
29 C
30 B
31 C
32 A
33 A
DT
Đỗ Thanh Hải
CTVVIP
23 tháng 3 2021
Viết lại câu
12
Authorities in Ho Chi Minh City suggested that current school break schould be extended by us until the end of March to control the epidemic caused by Covid-19
15 The plumber who has just been had check the pipes in my house is very skillful
16 In spite of the fact that we had invited her to the party, she didn't come
17 Since they didn't have a map, they lost their way
18 I suggest that energy-saving bulbs should be used to reduce the electricity bill
19 We are looking forward to seeing your gook action from your company
20 Linda congratulated Owen on scoring a wonderful goal
21 She had all the water pipes in her house checked by the plumber yesterday
22 If you go on smoking, you will be seriously sick
23 I suggested all the bag should be collected and taken to the garbage dump
24 If you aren't carefull, you will fall over the rocks
25 If you work too much, you will feel tired
26 If you are careless, you'll break the vase
ND
1
DT
Đỗ Thanh Hải
CTVVIP
6 tháng 12 2021
1 The girls really like rehearsing a play with friends
2 My younger brother prefers reading books to playing outdoor games
3 The harvest time occured earlier than we had thought
4 Children in the countryside knw about technology less cleary than children in big cities
My younger brother adores watching historical films
19 tháng 12 2022
Bài 6.
a)Công suất ấm: \(P=\dfrac{A}{t}=\dfrac{900\cdot1000}{10\cdot60}=1500W\)
Dòng điện qua ấm: \(I=\dfrac{P}{U}=\dfrac{1500}{220}=\dfrac{75}{11}A\)
Điện trở dây nung: \(R=\dfrac{U}{I}=\dfrac{220}{\dfrac{75}{11}}=\dfrac{484}{15}\Omega\)
b)Điện năng tiêu thụ trong 1 tháng (30 ngày):
\(T=900\cdot1000\cdot30\cdot3600=9,72\cdot10^{10}J=27000kWh\)
Tiền điện phải trả: \(T=27000\cdot1500=40500\left(k.đồng\right)\)
c)Công suất tiêu thụ thực:
\(P=UI=\dfrac{U^2}{R}=\dfrac{110^2}{\dfrac{484}{15}}=375W\)
19 tháng 12 2022
Bài 7.
CTM: \(\left(Đ_1ntR_b\right)//Đ_2\)
\(R_1=\dfrac{U_{Đ1}^2}{P_{Đ1}}=\dfrac{10^2}{2}=50\Omega;I_{Đ1đm}=\dfrac{P_{Đ1}}{U_{Đ1}}=\dfrac{2}{10}=0,2A\)
\(R_2=\dfrac{U^2_{Đ2}}{P_{Đ2}}=\dfrac{12^2}{3}=48\Omega;I_{Đ2đm}=\dfrac{P_{Đ2}}{U_{Đ2}}=\dfrac{3}{12}=0,25A\)
Để đèn 1 sáng bình thường \(\Rightarrow I_b=I_{Đ1đm}=0,2A\)
\(R_{Đ1+b}=\dfrac{12}{0,2}=60\Omega\)
\(R_b=60-R_{Đ1}=60-50=10\Omega\)
9. The students said they should finish their work before going out for lunch
14. Her mother told her to wash and iron her own clothes
15. My teacher told me that I should read those books
19. My grandparents told me that they would travel around the world by plane