1. I am not tall enough to reach the ceiling

2. She is sociable enough to make friends easily

3. He is looking at himself in the mirror at the moment 

4. I have to stop smoking

5. Mr. Kerry used to run 5 miles every morning when he was a teenager

6. We really like her sense of humor

7. He ought not to play computer games

8. Hilary doesn't hace to wear uniform at school

1. I am not tall enough to reach the ceiling

2. She is sociable enough to make friends easily

3. He is looking at himself in the mirror at the moment 

4. I have to stop smoking

5. Mr. Kerry used to run 5 miles every morning when he was a teenager

6. We really like her sense of humor

7. He ought not to play computer games

8. Hilary doesn't hace to wear uniform at school

C

thank

:v?

??????????

=x^4+1+2x^2+3x^3+3x+2x^2

=x^4+3x^3+4x^2+3x+2x^2

=x^3+x^3+2x^3+2x^2+2x^2+2x+x+1

=x^4+3x^3+4x^2+3x+1

mờ quá bạn ơi

6a) S=3 x 3 x \(\pi\)=9\(\pi\) (cm²)

6b) 6 x 6 - 9\(\pi\)= 36-9\(\pi\) \(\approx7,726\left(cm^2\right)\)

7a) (3x3)x6= 54(cm²)

7b) (3x3)x4= 36(cm²)

7c) 3 x 3 x3= 27(cm³)

7d) (4+2)x2 x 3= 36(cm²)

16 explorer

17 dramatically

18 survival

19 challenging

20 unconscious

26D 27C 28A 29C 30B

41. Was called by the time I arrived.

42. About taking up a cookery course?

Câu 1: p là số nguyên tố lớn hơn 3

=>p=3k+1 hoặc p=3k+2

Nếu p=3k+2 thì p+4=3k+2+4=3k+6=3(k+2)⋮3

=>Loại

=>p=3k+1

p+8=3k+1+8

=3k+9

=3(k+3)⋮3

=>p+8 là hợp số

Bài 2:

\(A=3+3^2+3^3+\cdots+3^{100}\)

\(=\left(3+3^2+3^3+3^4\right)+\left(3^5+3^6+3^7+3^8\right)+\cdots+\left(3^{97}+3^{98}+3^{99}+3^{100}\right)\)

\(=\left(3+3^2+3^3+3^4\right)+3^4\left(3+3^2+3^3+3^4\right)+\cdots+3^{96}\left(3+3^2+3^3+3^4\right)\)

\(=120\left(1+3^4+\cdots+3^{96}\right)\)

=>A⋮120