Hi Alice, I think it's a good idea to play tennis or basketball. Playing sport is a good way to stay healthy. I don't think you should play computer games all day. You should make sure you get enough sleep every night, between seven and 10 hours. You don't have to study for hours and should try to take regular breaks. You should eat lots of food and vegetables and get lots of regular exercise. Being healthy gives you more energy and makes you feel good.

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Tính ba góc của tam giác ABC biết:

6A = 14B = 21C ( góc A , B , C)

a, Tính ba góc của tam giác ABC biết:

6A = 14B = 21C ( góc A , B , C)

b,Tính ba góc của tam giác ABC biết:

A= 3C , B=2C

c, Tính ba góc của tam giác ABC biết:

A=2B ; B= 3C

TẤT CẢ ĐỀU LÀ GÓC NHA

Viết đoạn văn 7-9 câu có sử dụng thành ngữ mà em biết ( học tập)

 \(a,\dfrac{x+9}{-5}>0\)

\(b,\dfrac{2x+3}{2x-5}>0\)

\(c,\left(x+5\right)\left(x-9\right)>0\)

\(d,\left(x-\dfrac{1}{4}\right)\left(x+\dfrac{2}{3}\right)>0\)

\(\text{D= / 2x - 6/ + (3y +9)^4}+1\)

\(E=\dfrac{-5}{\left(x-3\right)^2+4}\)