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A=1^3+2^3+3^3+.........+99^3+100^3

B=1+2+3+4+.......+99+100

A:B=(1^3:1)+(2^3:2)+(3^3:3)+.........+(99^3:99)+(100^3:100)

=> A chia hết cho B 

​Tick Nhé  Tick Nhe   Nguyễn Thị Thùy Dương

IV-In about 100 words write about your family .

Let me tell you about my family. There are 5 people in my family, I live with my mom, my dad, and two young sisters. We live in Hai Phong. My mum 's name is Huong. She is 50, and she is a kind and great woman. She's tall, beautiful and healthy. My mom 's got long, black hair and brown eyes, and white skin.She is a housework, she spends most of her time to take care for my family. I very love and respect her. Im very greatful for my mom, My dad's name is Tu, he is a little fat and short, but he is very strong. He's a self-employed, and he is 53 years old. My dad is a kind, generous, frienly person.He alway teaches me how to becom a good man, and person Who is useful for the society. My sister is 10, she is a student,she 's very intelligent, and she like listento music, traveling. We all love, respect one another and get along well. I love my family.

a+x=5 => a=5-x

a-x=2 => a=2+x

==> 5-x=2+x <=> 2x=3 <=> x=1.5 (Loại vì ko TMĐK) 

Vậy ko tìm đc x nha bạn

Bài 1: Complete the second sentences so that it has a similar meaning to the first one. Use the world given in brackets. You must use between two and five words, including the word given.

1. A huge earthquake in 1995 struck the Janpanese city of Kobe

=> Kobe, a Japanese city...is strucked......by a huge earthquake in 1995

2.'' How about dinner out tonight? Tom suggested

=> Tom suggested that we...should invite.....for dinner that night

3. Please do more morning exercise if you want to keep fit

=> If you want to keep fit, you...should do....more morning exercise

4. Many people believe that UFOs are true. UFO is from''Unidentified Flying Object''

=> It's believed that UFOs,...what is.......from ''Unidentified Flying Object''

6. the car is in front of the computer

=>where is the car?

7 . I brush my teeth twice a day

=>how often do you brush your teeth?

8. I have english on mondays and thursday

=>when do you have english?

9. There are sixteen bays in my class

=>how many bays are there in your class?

10. she is cooking in the kitchen now

=>what is she doing in the kitchen now?

1. tìm câu hỏi cho từ gạch chân

1. there is a big garde in front of my house ?

=>what is there in front of your house?

2. She will have a great party next week ?

=>When will she have a great party?

3. Peter is playing soccer with his friends now

=>Who is Peter playing soccer with now?

4. My mother gets up at six o'clock every morning

=>What time does your mother get up every morning?

5. Tom likes english best

=>What subject does Tom like best?

10:5=2 giờ

tick nhé

Complete the sentences, using the present perfect form of the verbs in brackets.

"Do you want a drink?"-"No, thanks. I (have)__have_____ one."

I am hoping .................. the problem

A to solve B for solving C solve D solving

b. 30(x+2) - 5 (x-5) - 24x = 30x+60-5x+25-24x =(30x-5x-24x)+(60+25)=x+85=100

=> x=100-85=15