3070

D

1C   2A

1.Let's go to Hue.

2.What about playing soccer ?

3.What about singing song?

4.What about listening to music ?

xϵ{25,50,75}

=30+[150-3.(16+12)]

=30+[150-3.28]

=30+[150-84]

=30+66

=96

B

mk thấy thường thì gương cầu lồi mới làm kính chiếu hậu mà :v

\(5^{x-1}=25^2\)

\(5^{x-1}=\left(5^2\right)^2\)

\(5^{x-1}=5^4\)

=>\(x-1=4\)

    \(x=4+1\)

    \(x=5\)

Vậy \(x=5\)