ai giúp e vs ạ

1 such a low bridge that the bus couldn't go under it

2 plays football as well as Tom

3 wake me up at 6 o'clock tomorrow morning" I asked my mother

4 repaired next week

5 her good behavior, everyone likes her

6 her son to be careful when he crossed the street

7 he was seriously ill, he couldn't come

8 old enough to get married

9 the cheapest coat you have

\(5,2863< \overline{5,a8b1}< 5,3841\)

=>\(2863< \overline{a8b1}< 3841\)

=>\(\left(a,b\right)\in\left\{\left(2;7\right);\left(2;8\right);\left(2;9\right);\left(3;0\right);\left(3;1\right);\left(3;2\right);\left(3;3\right)\right\}\)

câu 1:C

Câu 11: D

II Grammar and....

choose the correct answer

3.D

4.A

5.B

6.C

7.C

8.C

C.Reading

read the...

1.B

2.C

3.D

4.B

3.D

4.A

5.B

6.C

7.C

8.C

Tôi còn thức lâu

Trang 1:

1)

1. C

2. D

2)

3. D

4. A

5. B

6. C

7. A

8. C

3)

1. B

2. C

3. A 

4. B

Trang 2

4)

D, B, A, C

5)

1. How far from Vinh Phuc to Ha Noi city.

2. I used to walk to school when I was a student.

3. In spite of the short, they still .....

4. This building has built in 19....

6)

1. How far is it from Phuc .... to Ha .... ?

2. When you went with your parent last year?

3. When the flower festival is celebrated?

4. Whose picture are there?

\(A\left(x\right)+B\left(x\right)=3x^4-4x^3+2x^2-3+8x^4+x^3-9x+\dfrac{2}{5}\)

\(=11x^4-3x^3+2x^2-9x-\dfrac{13}{5}\)

\(A\left(x\right)-B\left(x\right)=3x^4-4x^3+2x^2-3-8x^4-x^3+9x-\dfrac{2}{5}\)

\(=-5x^4-5x^3+2x^2+9x-\dfrac{17}{5}\)

\(B\left(x\right)-A\left(x\right)=8x^4+x^3-9x+\dfrac{2}{5}-3x^4+4x^3-2x^2+3\)

\(=5x^4+5x^3-2x^2-9x+\dfrac{17}{5}\)

\(A\left(x\right)+B\left(x\right)=11x^4-3x^3+2x^2-9x-\dfrac{13}{5}\)

\(A\left(x\right)-B\left(x\right)=-5x^4-5x^3+2x^2+9x-\dfrac{17}{5}\)

\(B\left(x\right)-A\left(x\right)=5x^4+5x^3-2x^2-9x+\dfrac{17}{5}\)

a) Ta có: \(P\left(x\right)=3x^5-2x^4-2x^5-2x^2-x+3x^2+2\)

\(=x^5-2x^4+x^2+2\)

Ta có: \(Q\left(x\right)=x^5+8-5x+3x^3+3x+x^4-4x^5\)

\(=-3x^5+x^4+3x^3-2x+8\)

b) \(P\left(x\right)+Q\left(x\right)=x^5-2x^4+x^2+2-3x^5+x^4+3x^3-2x+8\)

\(=-2x^5-x^4+3x^3+x^2-2x+10\)

\(P\left(x\right)-Q\left(x\right)=x^5-2x^4+x^2+2+3x^5-x^4-3x^3+2x-8\)

\(=4x^5-3x^4-3x^3+x^2+2x-6\)

\(R_{tđ}=R_1+R_2+R_3=6+12+20=38\Omega\)

\(I_3=I=\dfrac{U}{R}=\dfrac{36}{38}=\dfrac{18}{19}A\)

\(U_2=I_2\cdot R_2=\dfrac{18}{19}\cdot12=\dfrac{216}{19}V\)

\(P=U\cdot I=36\cdot\dfrac{18}{19}=\dfrac{648}{19}W\)

\(A=P\cdot t=\dfrac{648}{19}\cdot30\cdot60=61389,5J\)

\(MCD:R1ntR2ntR3\)

\(=>R=R1=R2=R3=6+12+20=38\Omega\)

\(=>I=I1=I2=I3=U:R=36:38=\dfrac{18}{19}A\)

\(=>U2=I2\cdot R2=\dfrac{18}{19}\cdot12=\dfrac{216}{19}V\)

\(=>A=UIt=36\cdot\dfrac{18}{19}\cdot\dfrac{30}{60}=\dfrac{324}{19}\)Wh

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