C=|x+1|+|3-x| với( -1≤x≤3) rut gon bieu thuc chua gia tri tuyet đôi

D=|x+1|+|x-3|

tính 2x-5y+7xy biết |x|+|y-2|=0

tính 2x^2-3y^2+6xy với |x-1|+|y-2|=0

tính 1/2*2+1/3*4+1/4*6+1/5*8+1/10*6+1/12*7+14*8

giúp mik nhé .cảm ơn trước ạ

IV. Complete the sentences with a verb from the box in the correct form.

1. Why didn’t you ...........your bed this morning?
2. I can’t come out now. I’m........... the cleaning.
3. Could you........ the dishwasher and put the things away, please?

4. It’s not fair. I..............breakfast yesterday. Nam should........... it today.

5. Look at this bin! Please............... the rubbish out now.

6. Mum, I’ve............. my room. Can I go out now?

7. Phong,.............. the table. It’s nearly dinnertime.

8. A: Where’s Dad?

B: He’s............... the car. He always............... the car on Sunday morning.

IV. Fill in each blank with the correct word/phrase

1. breadwinner 2. heavy 3. lifting 4. iron 5. chores 6. responsibilities

7. share 8. nurture 9. homemaker 10. groceries 11. laundry

16. If your partner has agreed to buy the........... , you might plan the week’s meals and make the shopping list.

17. We should pay attention to the conditions that.............and strengthen early childhood development and health across the life course.

18. Past studies have shown that couples who..............household chores report feeling happier overall.

19. Couples who share..............at home are happier overall.

20. It takes a housewife a lot of time to................clothes for the household.

21. I have watched my husband and children take over much of my role as a..........

22. The husband replaces the light bulbs while the wife does the .............

23. Nowadays in nuclear families, homemaker and...........roles have evolved into something that makes it impossible to define exactly.

24. Many couples find that they look at the division of .........differently.

25. Men and boys do most of the...................in the family.