\(\dfrac{4}{3}-\dfrac{13}{15}.x=\dfrac{2}{5}\)

\(\rightarrow x=\dfrac{\left(\dfrac{4}{3}-\dfrac{2}{5}\right)}{\dfrac{13}{15}}\)

\(\rightarrow x=\dfrac{14}{13}\)

Vậy \(:x=\dfrac{14}{13}\)

Thành tựu nghệ thuật đặc sắc của cư dân Cham-pa là:

A.công trình kiến trúc đền chùa

B.Kiến trúc nhà ở

C.Các bức tượng phật

D.kiến trúc đền tháp

\(\rightarrow D\)

Vì \(:a>b\) nên \(2a>2b\)

\(\rightarrow2a-1>2b-1\)

\(\rightarrow2a-1+1>2b-1+1\)

\(\rightarrow2a-1+1>2b-1+1-1\)

\(\rightarrow2a>2b-1\)

\(\rightarrowĐPCM\)

Playing exercise not only improves one health but also reduce stress. I choose to play badminton after a hard studying day. Badminton is a famous sport around the world. It is played by children, adult and even od people as it helps to exercise our muscles. Un football, badminton needs a smaller area of place to play. All the 2 players have to do is making the ball pass by a net until it drops on the ground. Although it seems to be easy, it requires lots of pracal skill and flexibility. Moreover, being good at badminton, one will be able to play other sport related to small ball such as table tennis. Nowadays, people tend to pay more attention to sports since it brings several physical and psychological benefits especially badminton. Besides, many high schools and universities teach badminton as a physical subject for students. In my opinion, everyone should take up badminton as a regular sports because of its advantages. Sport is necessary in modern society as human are going to be lazy.

Playing exercise not only improves one health but also reduce stress. I choose to play badminton after a hard studying day. Badminton is a famous sport around the world. It is played by children, adult and even od people as it helps to exercise our muscles. Un football, badminton needs a smaller area of place to play. All the 2 players have to do is making the ball pass by a net until it drops on the ground. Although it seems to be easy, it requires lots of pracal skill and flexibility. Moreover, being good at badminton, one will be able to play other sport related to small ball such as table tennis. Nowadays, people tend to pay more attention to sports since it brings several physical and psychological benefits especially badminton. Besides, many high schools and universities teach badminton as a physical subject for students. In my opinion, everyone should take up badminton as a regular sports because of its advantages. Sport is necessary in modern society as human are going to be lazy.

Ta quy ước: A bình thường >> a bị u xơ nang

Ta có:

+Minh lấy người vợ đầu, sinh con bị bệnh (aa), Minh bình thường

=> Minh và vợ đầu có kiểu gen kiểu gen là Aa

+Hồng có anh trai bị bạch tạng, Hồng bình thường

=>  Hồng có dạng: 1/3 AA : 2/3 Aa

Aa-->1/2A:1/2a

(1/3AA:2/3Aa)-->(1/3A)(1/3A:1/3a) =(2/3A:1/3a)

Xác xuất để sinh ra con bất kì bị bệnh là:

1/3x1/2=1/6

Nhìn vào biểu đồ ta thấy \(:x\le8\)

\(\xrightarrow[]{}\)\(x+2\le8+2\)

\(\rightarrow\)\(x+2\le10\)

\(\xrightarrow[]{}\) Chọn A

Áp dụng định lý Pytago trong tam giác vuông DEF : 

\(EF^2=DE^2+DF^2\)

\(\xrightarrow[]{}\)\(\sqrt{EF^2}=\sqrt{DE^2+DF^2}\)

\(\xrightarrow[]{}\)\(\sqrt{EF^2}=\sqrt{8^2+6^2}\)

\(\xrightarrow[]{}\)\(\sqrt{EF^2}=\sqrt{100}\)

\(\xrightarrow[]{}\)\(\sqrt{EF^2}=\sqrt{10^2}\)

\(\xrightarrow[]{}\)\(EF=10cm\)

Vậy \(:EF=10cm\)

1 is - speaks - is coming - will stay - will visit

2 does - speak - speaks

3 has - is eating

4 are playing

5 Do - speak

6 is singing

7 watches

8 is running

9 am not 

10 don't like

Trong các câu sau câu nào đúng?

A.Hai góc có chung một đỉnh là hai góc đối đỉnh.

B.Hai góc đối đỉnh thì bằng nhau.

C.Hai góc bằng nhau thì đối đỉnh.

D.Một góc có số đo 50⁰ thì góc đối đỉnh với nó có số đo 100⁰.