c) It's getting darker.

d) The weather is getting colder.

e) The students are getting better/well.

f) The school yard is getting cleaner.

\(\dfrac{5}{x-4}+\dfrac{4}{x+4}-\dfrac{2x-24}{x^2-16}=\dfrac{5}{x-4}+\dfrac{4}{x+4}-\dfrac{2x-24}{\left(x-4\right)\left(x+4\right)}=\dfrac{5\text{(x+4)+4(x-4)-2(x-12)}}{\left(x-4\right)\left(x+4\right)}=\dfrac{5x+20+4x-16-\left(2x-24\right)}{\left(x-4\right)\left(x+4\right)}=\dfrac{7x+28}{\left(x-4\right)\left(x+4\right)}=\dfrac{7\left(x+4\right)}{\left(x-4\right)\left(x+4\right)}=\dfrac{7}{\left(x-4\right)}\)

1.

->A lot of meat used to be eaten by my brother when he was a student

2.

->Will these instructions be translated for me?

C.Câu lệnh điều kiện dạng đủ

If <điều kiện> then <câu lệnh 1> else <câu lệnh 2>;

B 

sao lại đăng bài kiểm tra vậy bạn?

1. She said that she had damaged his car the previous day.

2. When I angry, I always throw away my phone.

3. It's just coming up to 15.30 p.m.

4.Nowadays, people often dump garbage wrap into the river.

5. The teacher makes her students do the homework.

a)Diện tích tam giác vuông ABC là:

S=1/2* AB *AC = 1/2 * 6 * 8= 24 (cm²)

b)Độ dài cạnh BC là:

theo định lý pytago về tam giác vuông, ta có

BC²= AB²+AC²= 6² + 8² = 100 cm => BC = \(\sqrt{100}\) ^{= 10cm}

c) Độ dài đường cao AH

AC²= BC*HC => HC = \(\dfrac{AC^2}{BC}\) ^{= 6,4 cm}

BH = BC - HC = 10 - 6,4 = 3,6 cm

AH² = BH*HC = 6,4 * 3,6 = \(\dfrac{576}{25}\) => AH = \(\sqrt{\dfrac{576}{25}}=4,8cm\)