7a

8b

will be

have

Gọi đáy lớn là x =>Đáy bé là 2/3x Theo đề, ta có: (2/3x+5)*2/3x*h/2-2/3x*x*1/2h=500 =>h/2[2/3x(2/3x+5)-2/3x^2]=500 =>h*[4/9x^2+10/3x-2/3x^2]=1000 =>h[-2/9x^2+10/3x]=1000 mà h*2/3x*x=900 nên 2/3x^2/(-2/9x^2+10/3x)=9/10 =>20/3x^2=-2x^2+30x =>26/3x^2-30x=0 =>x=45/13 =>Đáy bé là 30/13(m)

Write the correct form of the verbs in brackets. Use the future uses.

1. She __will have finished_(finish) her exams by then, so we can go out for dinner.

2. Wait! I _will help_(help) you.

3. This time tomorrow I _will have_(have) a discussion with my boss.

4. They have made a decision. They __are losing__(lose) weight next year.

5. My brother bought tickets. We. are flying (fly) to HCM city next month.

−154−67+154=(−154+154)−67=0−67=−67

 B.Giảm bụi và khí độc, cân bằng hàm lượng CO2 và O2

1)A

2 B

3 D

4 A

1) c

2)b

3)b

4)a

5)b

6)a

theo tui la the do