Hai phân số \(\frac{-0,5}{3}và\frac{0,7}{0,5}\: \)không phải là số hữu tỉ.
Vì \(\frac{-0,5}{3},\frac{0,7}{0,5}\)tử và mẫu không thuộc Z \(a,b\in Z,b\ne0\)

10 cm ket bn voi mk nha

gà: 22 con

chó: 14 con

1 my aunt is a talented artist. She draws picture.....skillfully....(SKILL)

2 Baseball is.....interesting ........for most teenagers in American. (INTEREST)

3 ....Safety........is the ost important for people on the road. therefore, a lot of programs on TV are made to rainse people's ....awareness ....of traffic (SAFE/ AWARE)

4 Walking is an easu and ..inexpensive .activity (EXPENSIVE)

5 Our walking club has nearly 15.....participants ...(PARTICIPATE)

We walk together every morning and sometimes at night

6 Can you speak more.....slowly.....I can't follow what you say (SLOW)

7 Students must.......carefully ....listen to the teachers in class to do exercises...well.....(CAREFUL/ GOOD)

8 Accidents can happen...accidents......on the road. we sometimes can't stop them

9 Following traffic sings on streets is a ......safe.......way to avoid accidents ( SAFELY)

10 A.....recent......... survey of teenagers in this country gave some....surprising ......result (RECENTLY/SURPRISE)

II Complete the paragraph with the correct tense of the verbs in brackets

When Tom (be)......was......young he used to play foolball and he (be).....was.........good at it, but then he(go) ....went.......away and ( work) .......worked.........in a town, and there (be)......was......no team for him there, so he ( stop) .......stopped......playing. Then he (begin)...began.....to get fat, so he (think)....thought.....Now I (get) am getting.....fatter and fatter. I know, I (play).......will play.....football again"

The dishes aren't washed.

Chiều cao hình tam giác là  :

\(\frac{559\times2}{43}=26\left(cm\right)\)

Nếu tăng cạnh đáy 8 cm thì cạnh đáy hình tam giác là :

\(43+8=51\left(cm\right)\)

Diện tích hình tan giác lúc đó là :

\(\frac{51\times26}{2}=663\left(cm^2\right)\)

Diện tích hình tam giác tăng thêm :

\(663-559=104\left(cm^2\right)\)

Đáp số : 104 cm²

1. would you
2. is she
3. will it
4. shouldn't they
5. am I

28 học sinh

nhớ bấm đúng cho mình nhé! mình nhanh nhất đấy!

1. isn't it
2. aren't they
3. aren't they
4. isn't he
5. am I