dạ cho em hỏi thời gian của một đại lượng là gì ạ

Câu 11: C

Câu 12: D

Câu 14: C

Câu 13 : A

D - C - B - A - B - C - C - B - C - A - B - B - D - B - C

Bài làm của mk nek:

2x+3x=5

=> x.(2+3)=5

=> x.5=5

=> x=5:5

=> x=1

thanks you for your help tran hoai thuong

bài làm

2x +3x =5

=>  x . (2+3)=5

=>  x=5:5

=>  x =1

vậy x =1

mình cx định hỏi này

\(6,24-\left(30+x\right)=x-\left(28-10\right)\\ \Leftrightarrow24-30-x=x-18\\ \Leftrightarrow-6-x=x-18\\ \Leftrightarrow x-18+x+6=0\\ \Leftrightarrow2x-12=0\\ \Leftrightarrow2x=12\\ \Leftrightarrow x=6\)

6: \(\Leftrightarrow-6-x=x-18\)

\(\Leftrightarrow-2x=-12\)

hay x=6

6, <=> 24-30-x =x -28+10

<=> -6-x = x -18

<=> x= 6

450x0,45+1,5x30x3+5x9x2,5

= 45 x (0,45 x 10) + 45 x 3 + 45 x 2,5

= 45 x (4,5+3+2,5)

= 45 x 10

= 450

=202,5+135+112,5

=450

tick mik nha

6. Mary asked me if she had to go then

7. John asked Nhi if Ha Long Bay was in northern Vietnam

8. Linh asked me if I would come to her house for dinner

9. The teacher asked Nam if Mount Everest was the highest mountain in the world

10. The young man asked Mary if she saw what he saw

______

III

1. The teacher told Nam to open the door

2. Hoa asked me to speak more slowly

3. Lan invited me to go to the movies that night

4. The teacher told us not to make noise in class