mn giúp mik bài này vs ạ. mik cảm ơn mn rất nhiều
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![](https://rs.olm.vn/images/avt/0.png?1311)
em ơi chưa có bài em nhé, em chưa tải bài lên lám sao mình giúp được
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1, What would he like to have for breakfast?
He would like to have a sandwich
2,Who would you like to go fishing with?
I would like to go fishing with my father
3,What would her children like to do in the summer?
They would like to go swimming
4,When would Mrs Tam like to go shopping?
She would like to go shopping at weekends
5,Where would Hung and Tung like to study
They would like to study in the library
1 What would he like for breakfast?
He'd like a sandwich
2 Who would you like to go fishing with?
I would like to go with my father
3 What would her children like to do in summer?
They would like to swim inpool
4 When would Mrs Tam like to go shopping?
She would like to go shopping on the weekends
5 Where would Tung and Hung like to study ?
THey would like to study in the school library
![](https://rs.olm.vn/images/avt/0.png?1311)
1:
AC=căn 5^2-3^2=4cm
BH=AB^2/BC=1,8cm
CH=5-1,8=3,2cm
AH=3*4/5=2,4cm
2:
ΔCBA vuông tại B có tan 40=BC/BA
=>BC/10=tan40
=>BC=8,39(m)
ΔCBD vuông tại B có tan D=BC/BD
=>BD=8,39/tan35=11,98(m)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: Xét ΔABC vuông tại A và ΔHBA vuông tại H có
góc B chung
=>ΔABC đồng dạng với ΔHBA
=>AB/HB=AC/HA
=>AB*HA=HB*AC
b: AH=căn 5^2-3^2=4cm
BI là phân giác
=>HI/HB=IA/AB
=>HI/3=IA/5=(HI+IA)/(3+5)=0,5
=>HI=1,5cm; IA=1,5cm
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 6:
a: =12x^2+4x-3x-1-5x^2+15x-x^2+7x-12
=6x^2+23x-13
b: =5x^2+5x-2x-2-3x^3+3x^2+9x-2x(x^2-9x+20)
=-3x^3+8x^2+14x-2-2x^3+18x^2-40x
=-5x^3+26x^2-26x-2
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(x^3+8=\left(x+2\right)\left(x^2-2x+4\right)\)
b: \(27y^3+1=\left(3y+1\right)\left(9y^2-3y+1\right)\)
c: \(x^3-27=\left(x-3\right)\left(x^2+3x+9\right)\)
d: \(x^3-1=\left(x-1\right)\left(x^2+x+1\right)\)
e: \(8x^3+1=\left(2x+1\right)\left(4x^2-2x+1\right)\)
f: \(27x^3+64y^3=\left(3x+4y\right)\left(9x^2-12xy+16y^2\right)\)
g: \(x^3-\dfrac{1}{8}=\left(x-\dfrac{1}{2}\right)\left(x^2+\dfrac{1}{2}x+\dfrac{1}{4}\right)\)
a: Xét ΔAHM vuông tại H và ΔAHD vuông tại H có
AH chung
HM=HD
Do đó: ΔAHM=ΔAHD
=>AM=AD và \(\widehat{HAM}=\widehat{HAD}\)
Xét ΔAMF và ΔADF có
AM=AD
\(\widehat{MAF}=\widehat{DAF}\)
AF chung
Do đó: ΔAMF=ΔADF
b: Xét ΔAKD vuông tại K và ΔAKN vuông tại K có
AK chung
KD=KN
Do đó: ΔAKD=ΔAKN
=>AD=AN và \(\widehat{KAD}=\widehat{KAN}\)
Xét ΔADE và ΔANE có
AD=AN
\(\widehat{DAE}=\widehat{NAE}\)
AE chung
Do đó: ΔADE=ΔANE
=>\(\widehat{ADE}=\widehat{ANE}\left(1\right)\)
ΔAFM=ΔAFD
=>\(\widehat{AMF}=\widehat{ADF}\left(2\right)\)
Ta có: AD=AN
AD=AM
Do đó: AN=AM
=>ΔANM cân tại A
=>\(\widehat{AMF}=\widehat{ANE}\left(3\right)\)
Từ (1),(2),(3) suy ra \(\widehat{ADF}=\widehat{ADE}\)
=>DA là phân giác của góc FDE