Làm giúp mình mấy câu này với ạ,
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KY
18 tháng 12 2021
like playing soccer, don't you
goes to school late, doesn't he
can swim very well, can't you
is going to the party, isn't she
was published in Germany in 1550, wasn't it
are sold all over the world, aren't they
have been built this year, haven't they
was given a book, wasn't he
were bought by Mrs Brown yesterday, weren't they
is used everyday, isn't it
SB
6 tháng 7 2021
mình làm những bài bn chưa lm nhé
9B
10A
bài 2
have repainted
bàii 3
ride - walikking
swimming
watch
ai giúp mình làm đống này với chỉ cần trả lời câu mấy ý mấy là được rồi ạ 
,
28 tháng 12 2020
In the age of technology, laptop is used widely. The laptop brings us a lot of benefits for our live. it is very versatile as it can do many things. firstly, it is portable. therefore, people can take it everywhere. secondly, it is economical so everyone don't have to spend too much money to buy it. besides, the laptop is a mean of entertainment. we can use it to listen to music, to chat with friends, to make video call with parents, to play games, and so on. last but not least, we can use laptop for studying. for example, the laptop can be used for researching topics on the Web or typing the assignment as well. In summary, laptop is definitely one of the greatest inventions in the world as well as the best thing in our society.
P/s: Mình nghĩ nói ngắn quá sẽ không có điểm cao lắm đâu, không cần nói quá dài hoặc quá ngắn. Chỉ cần đầy đủ ý trong bài là ok. Với lại khi nói bạn nhớ phải tự tin lên nha. FIGHTING!!!!
9 tháng 8 2021
Bài 1:
a) (2x+5)(x-6)=2x2+5x-12x-30=2x2-7x-30
b) (2x-1)(x2-4x+3)=2x3-8x2+6x-x2+4x-3=2x3-9x2+10x-3
c) x2-2x-(x-7)(x+2)=x2-2x-x2+7x-2x+14=3x+14
d) 3x-(x+2)(x+4)=3x-x2-2x-4x-8=-x2-3x-8
9 tháng 8 2021
Bài 2:
a) 2(x+1)=x-1
⇒2x+2=x-1
⇒2x+2-x+1=0
⇒x+3=0
⇒x=-3
b) x(x+2)-x2=1
⇒x2+2x-x2=1
⇒2x=1
⇒x=0,5
c) 3x(x-2)=(3x-1)(x-1)-5
⇒3x2-6x=3x2-x-3x+1-5
⇒3x2-6x-3x2+x+3x-1+5=0
⇒-2x+4=0
⇒-2x=-4
⇒x=2
d) 6(x-1)(x-2)-6x(x+3)=2x
⇒6(x2-x-2x+2)-6x2-18x-2x=0
⇒6x2-6x-12x+12-6x2-18x-2x=0
⇒-38x+12=0
⇒-38x=-12
⇒x=\(\dfrac{6}{19}\)
TA
4
25 tháng 2 2021
I)1.B
2.B
3.C
4.D
5.C
II)
1.B
2.D
3.B
4.B
5.A
6.B
7.tell....way.
8.C
III)
1.isn't teaching
2.drive
3.has
1: Xét ΔABC vuông tại A có
\(\widehat{B}+\widehat{C}=90^0\)
hay \(\widehat{C}=30^0\)
Xét ΔABC vuông tại A có
\(BC=\dfrac{AC}{\sin60^0}\)
\(=\dfrac{32\sqrt{3}}{3}\left(cm\right)\)
hay \(AB=\dfrac{16\sqrt{3}}{3}\left(cm\right)\)