1 what do you spend your money on?

>> I spend my money on doing volunteer.

2 what was the last thing you bought?

>> It's a rings .

3 do you swap things?what?

>>Yes, I do. It's a lovely doll for my sister

4 what do you never lend?

>> It's my heart.

Complete the sentences for you.Use comparative adjectives+than

1.Football is__________more interesting_______than__________basketball

2.Being an actor is________more happier than_____begining a teacher

3 A netbook is__________more useful than___________ an mp3 player

4.My best friend is___________better than_____________________me.

=>x/2=y/3 =>x/10=y/15 (1)

y/5=z/4 =>y/15=z/12 (2)

từ 1 và 2 ta có: x/10=y/15=z/12

áp dụng tc của dãy ts = nhau ta có:

x/10=y/15=z/12=x+y-z/10+15-12=78/13=6

=>x/10=6=>x=60

=>y/15=6=>y=90

=>z/12=6=>z=96

1.What is your favourite piece of technology?

_________Its useful______________________________________

2.Which websites do you use?

___________Hoc24.vn_____________________________________

3.What do you use a computer for?

___________Studying all subjects at school______________

4.What technology has your school got?

_________Smart phone__________________________________________

(x - 3)² = (2x - 1)²

=> |x - 3| = |2x - 1|

=> x - 3 = 2x-1 hoặc x - 3 = -(2x - 1)

x - 2x = -1 + 3 hoặc x - 3 = -2x + 1

-x = 2 hoặc x + 2x = 1 + 3

x = -2 hoặc 3x = 4

x = -2 hoặc x = 4 : 3

x = -2 hoặc x = 1,(3)

1/3+1/5 < 1/3 : 1/5

1/3-1/4 =1/3 * 1/4

11/12-11/12 < 2/3-1/4