giúp mik ạ mik cần gấp !!
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PT
giúp mik với ạ mik cần gấp. GIẢI CỤ THỂ GIÚP MIK vs ạ
2
A
1
MM
1
DT
Đỗ Thanh Hải
CTVVIP
17 tháng 9 2021
1 is explained
2 was stolen
3 will be opened
4 is being closed
5 is going to be built
SP
1
G
1
LN
1
DT
Đỗ Thanh Hải
CTVVIP
27 tháng 11 2021
1 were - would you play
2 weren't studying - would have
3 had taken - wouldn't have got
4 would you go - could
5 will you give - is
6 recycle - won't be
7 had heard - wouldn't have gone
8 would you buy - had
9 don't hurry - will miss
10 had phoned - would have given
11 were - wouldn't eat
12 will go - rains
13 had known - would have sent
14 won't feel - swims
15 hadn't freezed - would have gone
QN
2
MA
2
23 tháng 12 2021
e: \(E=\dfrac{x^2-9-x^2+4-x^2+9}{\left(x+3\right)\left(x-2\right)}\)
\(=\dfrac{x+2}{x+3}\)
a: \(A=\dfrac{4x^2+x^2-2x+1+x^2+2x+1}{\left(x-1\right)\left(x+1\right)}\)
\(=\dfrac{6x^2+2}{\left(x-1\right)\left(x+1\right)}\)
a) \(Ax//By\) vì chúng cùng vuông góc với đường thẳng \(c\).
b) Qua C kẻ tia Cz song song với tia Ax (ở đây Cx "hướng" về phía A, B). Hiển nhiên \(Cz//By\) vì chúng cùng song song với Ax.
\(Cz//Ax\) \(\Rightarrow\widehat{CAx}=\widehat{ACz}\) (2 góc so le trong)
Mà \(\widehat{CAx}=40^o\left(gt\right)\) \(\Rightarrow\widehat{ACz}=40^o\)
\(Cz//By\) \(\Rightarrow\widehat{CBy}=\widehat{BCz}\) (2 góc so le trong)
Mà \(\widehat{CBy}=30^o\left(gt\right)\) \(\Rightarrow\widehat{BCz}=30^o\)
Lại có \(\widehat{ABC}=\widehat{ACz}+\widehat{BCz}=40^o+30^o=70^o\)
Vậy \(\widehat{ABC}=70^o\)
Mình sửa lại chút đoạn cuối là \(\widehat{ACB}\) chứ không phải \(\widehat{ABC}\) nhé.