các bn giúp mik vs ạ
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1 responsible
2 colorful
3 pollution
4 disappointed
5 hopeless
VII
1 wear
2 to take
3 pick
4 didn't have
5 got
36 I think I and my brother will be at school
37 Is the bakery on the corner of the street?
38 Why shouldn't we let our children play in the kitchen?
39 It is usually cool and foggy in autumn in my country
40 How many lessons do you have on Tuesday?
1 means
2 pictures
3 making
4 bring about
5 Through
6 In addition
7 designed
8 entertaining
9 include
10 events
21 means
22 pictures
23 make
24 bring about
25 Through
26 In addition to
27 designed
28 entertaining
29 include
30 events
1.
⇒ He doesn't work as hard as me
⇒ He is lazier than me.
2.
⇒ Your bedroom is more uncomforable than my bedroom.
⇒ Your bedroom is not as comfortable as my bedroom.
3.
⇒ Mary speaks English better than John.
⇒ Mary doesn't speak English as worse as John.
4. No boy in my class are as intelligent as Jack.
5. They suggest that he should play football.
1. -> He doesn't work as hard as me.
-> He works lazier than me.
2. -> Your bedroom isn't as comfortable as mine.
-> Your bedroom is uncomfortable than mine.
3. -> Mary speaks English better than John.
-> Mary doesn't speak English as bad as John.
4. -> No boy is as intelligent as Jack in my class.
5. -> They suggest playing football.
\(A=\dfrac{x^2+2x-3-x^2+6x-9-4x+2}{\left(x-3\right)\left(x+3\right)}:\dfrac{x+3-x-1}{x+3}\\ A=\dfrac{2\left(2x-5\right)}{\left(x-3\right)\left(x+3\right)}\cdot\dfrac{x+3}{2}=\dfrac{2x-5}{x-3}\)
a: \(A=\dfrac{x^2+2x-3-x^2+6x-9-4x+2}{\left(x-3\right)\left(x+3\right)}:\dfrac{x+3-x-1}{x+3}\)
\(=\dfrac{4x-10}{\left(x-3\right)\left(x+3\right)}\cdot\dfrac{x+3}{2}=\dfrac{2x-5}{x-3}\)
a: ΔABC vuông cân tại A
mà AD là đường trung tuyến
nên AD\(\perp\)BC
ΔABC vuông cân tại A
=>\(\widehat{ABC}=\widehat{ACB}=45^0\)
Xét ΔDAB vuông tại D có \(\widehat{DBA}=45^0\)
nên ΔDAB vuông cân tại D
Xét ΔDAC vuông tại D có \(\widehat{DCA}=45^0\)
nên ΔDAC vuông cân tại D
b: Ta có: \(\widehat{EAB}+\widehat{EAC}=90^0\)
\(\widehat{EAC}+\widehat{FCA}=90^0\)
Do đó: \(\widehat{EAB}=\widehat{FCA}\)
Xét ΔEAB vuông tại E và ΔFCA vuông tại F có
AB=CA
\(\widehat{EAB}=\widehat{FCA}\)
Do đó: ΔEAB=ΔFCA
=>EB=FA
c: Xét tứ giác AEDB có \(\widehat{AEB}=\widehat{ADB}=90^0\)
nên AEDB là tứ giác nội tiếp
=>\(\widehat{AED}+\widehat{ABD}=180^0\)
mà \(\widehat{AED}+\widehat{MED}=180^0\)(kề bù)
nên \(\widehat{MED}=\widehat{MBA}=45^0\)
Xét tứ giác ADFC có \(\widehat{ADC}=\widehat{AFC}=90^0\)
nên ADFC là tứ giác nội tiếp
=>\(\widehat{ACD}=\widehat{AFD}=45^0\)
Xét ΔDEFcó \(\widehat{DEF}=\widehat{DFE}=45^0\)
nên ΔDEF vuông cân tại D