Thời gian đi là 7h15'-5h10'+15'=2h20'=7/3(h)

Vận tốc là 88:7/3=264/7(km/h)

\(21_{10}=10101_2\)

Câu 1 

d2: =sum(a2:c2)

d3: =sum(a3:c3)

d4: =sum(a4:c4)

d5: =sum(a5:c5)

d6: =sum(a6:c6)

có thể lm 1 vài bài thôi cx dc, ko nhất thiết phải lm hết nha

mà cố gắng lm hết giùm mik, cảm ơn nhìu

Bài 5:

Theo đề có: \(\left\{{}\begin{matrix}a\perp c\\b\perp c\end{matrix}\right.\Rightarrow a//b\)

Theo tính chất kề bù có:

\(\widehat{A_1}+\widehat{A_2}=180^o\\ \Rightarrow\dfrac{7}{11}\widehat{A_2}+\widehat{A_2}=180^o\\ \Rightarrow\widehat{A_2}=\dfrac{180^o}{\dfrac{7}{11}+1}=110^o\)

Lại có: a//b nên

\(\widehat{A_2}+\widehat{B_1}=180^o\) (trong cùng phía)

\(\Rightarrow\widehat{B_1}=180^o-110^o=70^o\)

25 What are you going to do this week?

26 We might go on holiday to the moon in the future

27 There will be a robot in my house

28 The room is very large

25.What are you going to do this week?

26.We might go on holiday to the moon in the future.

27.There will be have robot in my house.

28.The room is large

Chúc bạn học tốt✔✔

\(-\dfrac{3}{8}-\dfrac{6}{-15}=-\dfrac{3}{8}+\dfrac{6}{15}=\dfrac{1}{40}\)

\(-\dfrac{3}{8}-\dfrac{6}{-15}=-\dfrac{3}{8}+\dfrac{6}{15}=-\dfrac{45}{120}+\dfrac{48}{120}=\dfrac{3}{120}=\dfrac{1}{40}\)

1 - my school is bigger than your school                          8 Nam is shorter than his sister 
4 - this ruler is longer than  that ruler 
7 - my house is taller than your house 

3 My father is oldder than my mother

4 This ruler is longger than that ruler

5 This room is larger than my room

 My school is bigger than your school       .     LAN is younger than Hoa     .     My father is older than my mother.   

This ruler is longer than that ruler      This room is larger than my room  .the boys are stronger than the girls 

 My house is taller than your house       Nam is shorter than his sister 

                Đây mới học lớp 6 đã làm đc rồi nè