1. The answer requires the user to provide theri full name

2. The answer requires the user to identify their favorite room in their house

3. The answer requires the user to state something they would like to change in their neighborhood

4. The answer requires the user to state how often they travel and who they travel with

5. The answer requires the user to confirm if they had a travel problem and describe it applicable

1, She used to wear a special dress for family gatherings when she was a kid

2, He usually takes notes in class because of his need to remember everything

1, People walked to school every day to the absence of cars

2, She has the ability to understand the main idea of English texts now

3, I came across an old photo of my aunt while I was cleaning

Độ dài vùng được chiếu sáng trên mặt đất là khoảng 2,1 m

1.Sin 35°=cos55°

tan 28°=cot 62°

2.trong tam giác ABC vuông tại A,ta có

CosB=AB/BC

Thay giá trị đã BT vào công thức cos 36° = AB/20

AB=20 • cos B =20•cos 36°

Cos 36°~ 0,809

AB ~20•0,809=16,18 cm

Tốc độ lúc về của người đó là 30km/h

a. ĐKXĐ x+5 hoặc x khác -5

2(x+6)/2(x+5) +3(x+5)/2(x+5)=2. 2(x+5)/2(x+5)

Quy đồng khử mẫu , ta có

2(x+6)+3(x+5)=4(x+5)

2x+12+3x+15=4x+20

5x+27=4x+20

5x-4x=20-27

x=-7 ( TMĐK)

Vậy phương trình đã cho có nghiệm x=-7

b. (x,y)=(7;-3)