Ta có: x - 5 = 6

          x= 5+6

          x=11

Vậy x=11

Nhớ tick cho mình nha.Ai tick mình tick lại cho.

1 số đó là số:85

57 Ha Nam Street, Dong Da, Ha Noi 2 September, 2017

Director

Hear to Heart Charity Office

15 Ha Thanh Street, Ha Noi, Viet Nam.

Dear Sir or Madam,

I'm writing with regard to apply for the post of a volunteer cashier at Heart to Heart Charity Office. Last night, I saw the advertisment " Volunteer Activities" program on TV.

I have experience of doing office work. Last summer I had a chance to volunteer at Happy Mind Charity Centre as a front office worker. There, I welcome visiting donors an volunteers as well.

I'm reliable and hard- working. I used to pick money up on the street and I gave it to the police station in order to find out a person who lost it. And then, I'm nominated in newspaper.

Moreover, I used to gather lots money in order that I could give it to people who live in centre of VN after the flood.

I look forward to hearing from you.

Yours faithfully,

(Name)

K chép mạng đâu bạn nha!!!

ĐK: x-1# 0<=> x#1

2x(x-1)+3=3x

<=> 2x² -2x+3=3x

<=> 2x² -5x+3=0

Giải pt bậc 2 ta đc: x₁ = 1 ( loại)

x₂ =3/2

Vậy pt có nghiệm S={3/2}

1.15

2.Q= 20;31;42;53;64;75;86;97 

3.998

4.6

5.10

6.8

7.504

8.20

9.1252

10.12

a. 5/x-1 có nghĩa <=>

x -1#0 <=> x# 1

b. *f(-2)

Thế x = -2 vô pt

=>y= 5/-3

*f(0)

=>y= 5/-1

*f(2)

=> y= 5

*f(1/3)

=>y= 15

c. *Thế y=-1 vô pt

Ta có: -1= 5/x-1

<=>-(x-1)=5

<=>x=4

*Thế y=1

Ta có:

5/x-1=1

<=>x-1=5

<=> x=6

*Thế y=1/5

Ta có: 5/x-1=1/5

<=>25=x-1

<=>x=26

d. Chỉ cần vẽ trên hệ trục à bạn, không có gì để tính hết

1Do you know the music, Which is being played down the radio.

2. A plane,which was carrying 120 passengers crashed into the sea yesterday.

3.I would like to say sorry a boy, whose toy was broken by me yesterday.

4. The girl, who chatted with him yesterday arrived here at 7a. m

5. The young man,who rides an expensive motorbike, lives on the corner.

6.The boy whom I met at the party last night is a my friend's brother.

7.I won the scholarship which amazed everyone in my family.

PASSIVE

1 My bedroom has been decorated.

2. They have always been driven to the airport by Andy.

3. The bank near our house has just been robbed.

4.That fim hasn't recently been seen.

5.A lot beautiful flowers have been bought by my mother

Thế này: phần trăm cái gì thì bằng k/l cái đó nhân 100 chia Tổng nha.

Ex: SO2

%S= (MS. 100)/64

=(32.100)/64

Câu 1

N2 +O2-> X (1)

Tỉ khối hơi của X vs O tức là:

dx/O2= Mx/32=1.4375

Mx= 46

(1)-> 2N2+O2->NO2

MNO2= 14+32=46 ( đúng)

X là NO2

Câu 2 tương tự

đY/O2= MY/32=2

=> MY= 64

Theo đề: S+ O2->SO2

MSO2= 32+32=64

=> Y là SO2

Thật ra cái này k cần tính tỉ khối hơi cũg bk đc X vs Y á, đề cho hơi thừa í.

Hàm số dạng chung : y=ax+b

Mà A(1;2)

B(-2;3)

Ta có hệ pt:

a+b=2

-2a+b=3

=> b=7/3

a=-1/3