It is the most delightful party of my life.

My neighbors are concerned about the environment.

We celebrate the New Year on January 1.

I can't go with you. Thanks anyway.

Mr. Brown often attend clean-up campaignss

@phynit

Please don't disturb me unless there is something urgent.

Nếu ai theo dõi câu trả lời mình thấy đúng thì Tick dùm mình nhé!!!

Please don't disturb me if notthing there is something urgent.

Đúng

1) a = (2⁷.5⁷). 2⁶ = 10⁷. 64 = 640 000 000 =>a  có 9 chữ số

2) 10⁶ - 5⁷ = 2⁶.5⁶ - 5⁷ = 5⁶. (2⁶ - 5) = 5⁶. 59 => 10⁶ - 5⁷ chia hết cho 59

3) 12⁸.9¹² = (2².3)⁸.9¹² = 3⁸.2¹⁶.9¹² = 9⁴.2¹⁶.9¹² = (9.2)¹⁶ = 18¹⁶

b) 45¹⁰.5³⁰ chia hết cho 5 

72²⁰ không chia hết cho 5

=> đề sai

số tiền mua 1 căn hộ đúng k0

1. Tìm x,y biết: ( x,y thuộc N)

a) (2x+1) (y-3) =10

Ta có: 10 = 2.5

=> 2x+1=5

=> y-3=2

Để 2x+1=5 => 2x=4=> x= 2

Để y-3=2 => y= 4

Vậy x=2 ; y=4

@phynit