Cứuuuuuu với plll
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17 tháng 12 2021
x(x2+3x+9)-3(x2+3x+9)+5x-x3=6x
x3+3x2+9x-3x2-9x-27+5x-x3=6x
5x-27=6x
5x-6x=27
-x=27
=>x=-27
NT
Cứuuuuuu giúp mk với 😫 mk đang cần gấp đề bài là : Make questions for the underlinedwords or phrases
2
TM
23 tháng 8 2021
17. When did Nam leave home yesterday?
18. How long has he taught English in the high school?
19. How was the homework yesterday?
20. When does she often do the housework?
21. How many roses they're planting in the garden?
22. Who will Liz send these letters to?
23. What's your favourite subject?
24. Do we have magazines and newspapers?
25. What do you often do in your free time?
26. Is he good at drawing?
27. What does she learn in computer science class about?
28. What's your mother do at the moment?
29. What sport does Lan like?
30. How often do you go to the movies?
TT
23 tháng 8 2021
17)When did Nam leave home yesterday
18)How long has he taught English
19)How was the homework yesterday
20)When does she often do homework
21)How much roeses are they planting in the garden
22)Who will Liz send these letter
23)What subject do you like
24)Do you have any magazines and newspapers
25)What often do you do in your free time?
26)Is he good at drawing?
27)What she learn about in science class?
28)What is your mother doing at the moment
29)What sport does lan like best?
30)how often do you go to the movie
DT
Đỗ Thanh Hải
CTVVIP
17 tháng 8 2021
1 She is being helped with the housework
2 That film is being remarked
3 Is a new barn being built by the farmer
4 The dinner is being prepared in the kitchen
IV
1 Books were being read by me at 7 o'clock yesterday morning
2 Was television being broken at 9o'clock last night
3 A song was being sung by Nina when you came
4 He was being called by Hoe on the wat to Noi Bai airport
5 Her room wasn't being cleaned at 9o'clock yesterday evening
V
1 Some trees have been planted by the gardener
2 The English gramma has been explained by our teachers
12 tháng 4 2023
a: Bán kính hình nón là:
(86-2,1*2)/2=40,9
Sxq=3,14*40,9*72=9246,672
S hình tròn=3,14*40,9^2=5252,6234
\(S_{vànhmũ+đáy}=3,14\cdot\left(\dfrac{86}{2}\right)^2=135.02\)
=>\(S_{vànhmũ}=5117.6034\)
\(S_{vải}=5117.6034+9246.672=14364.2754\)
b: Chiều cao hình nón là: \(\sqrt{72^2-40.9^2}\simeq59\)
\(V=\dfrac{1}{3}\cdot3.14\cdot40.9^2\cdot59=103301\left(cm^3\right)\)
TP
27 tháng 11 2021
\(a.Al_2O_3-PTK:102\left(đvC\right)\\ K_2O-PTK:94\left(đvC\right)\\ MgO-PTK:40\left(đvC\right)\\ PbO-PTK:223\left(đvC\right)\\ CH_4-PTK:16\left(đvC\right)\\ NH_3-PTK:17\left(đvC\right)\\ b.Zn\left(NO_3\right)_2-PTK:189\left(đvC\right)\\ Na_3PO_4-PTK:164\left(đvC\right)\\ Ba\left(NO_3\right)_2-PTK:261\left(đvC\right)\\ BaSO_4-PTK:233\left(đvC\right)\\ Ag_2SO_4-PTK:312\left(đvC\right)\)
MS
8
C
C