32. Tom is strong so he can lift that heavy table

33. Nam's father used to drink a lot of wine

34. We have been in Sapa for 2 years

35. l don't mind to help you repair the radio

36.He climbed a tree in order to get  a better view

37. Did Jame Watt invent the steam engine?

38. This is the first time she has seen a more unusal festival than this

39. An important experiment is being carry out by the scientists

40. Cheese is made from milk

CHÚC EM HỌC TỐT NHÁ 

b: Xét ΔABH vuông tại H có 

\(AB^2=AH^2+HB^2\)

hay AH=12(cm)

Xét ΔAHB vuông tại H có 

\(\sin\widehat{B}=\cos\widehat{C}=\dfrac{AH}{AB}=\dfrac{12}{13}\)

\(\cos\widehat{B}=\sin\widehat{C}=\dfrac{5}{13}\)

\(\tan\widehat{B}=\cot\widehat{C}=\dfrac{12}{5}\)

\(\cot\widehat{B}=\tan\widehat{C}=\dfrac{5}{12}\)

BÀI 3:

bài 4:

Là mấy bài này em làm được bài nào chưa?

9 nghìn đồng

9 nghìn đồng

8833,62753 : 10101 x 100 

= 8833,62753 : 1010100

= 0.0087453

HT

lười lắm ko thik tính toán

2 she had got the price of the contest, she would be happy now

3 I had gone to the concert last night ,I would be tired

4 John had finished all his homework, he could see a movie now

5 we had listened to my mother, we wouldn't be in trouble right now

Ex5

1 you arrive at the offcie earlier than I do, please turn on the air-conditioner

2 Were it not snowy, the children would go to school

3 he not died so young, he would be a famous musician

4 Were I you, I would take care of my car

5 not very bad-tempered, his wife would give him soon are marrage

6 Had she not got married at such an early age, he would be at university

tích rồi anh bày cho

k là gì zợ

\(a+a.\frac{3}{2}+a:\frac{2}{7}=252\)

=>\(a+a.\frac{3}{2}+a.\frac{7}{2}=252\)

=>\(a.\left(1+\frac{3}{2}+\frac{7}{2}\right)=252\)

=>\(a.\left(1+5\right)=252\)

=>\(a.6=252\)

=>\(a=42\)

Vậy \(a=42\)

A+Ax3/2+A:2/7=252

A+Ax3/2+Ax7/2=252

Ax(1+3/2+7/2)=252

Ax6=252

A=42

HT

thank nha