Sắp xếp những từ sau để viết thành câu hoàn chỉnh

1. books / essays / Literature / we / the / learn / write / about / in / and

-> We learn about the books and write essays in Literature.

2. room / music / guitar / Ba / play / learning / the / the / in / to / is

-> Ba is learning to play the guitar in the music room.

3. dinner / house / you / our / like / would / come / to / to / for

-> Would you like to come to our house for dinner?

4. friends / guitar / I / playing / the / with / am / my

-> I am playing the guitar with my friends.

5. o'clock / dinner / she / at / seven/ usually / has

-> She usually has dinner at seven o'clock.

6. football / basketball / baseball / activities / after - school / USA / most / the / the / are / and / popular / in

-> Football, basketball, and baseball are the most popular after-school activities in the USA.

1. They couldn't help you because they were not here

-> They were not here so they couldn't help you

2. I can't go out because it's raining

-> It's raining so I can't go out

3. This book is interesting enough for me to read many times

-> This book is interesting so I read it many times

4. She doesn't study hard and she can't pass the pass

-> She doesn't study hard so she can't pass the pass

5. This car is too old for me to buy

-> This car is too old so I don't buy it

6. I couldn't go to China because i didn't have enough money

-> I didn't have enough money so I couldn't go to China because

7. This house is too old to live in

-> This house is too old so I don't live in

8. He is too young to go to school alone

-> He is too young so he doesn't go to school alone

9. You must be careful because he is very strict

-> He is very strict so you must be careful

10. The test was so that i couldn't finish it in an hour

-> The test was so difficult so I couldn't finish it in an hour

1.I'm not as tall as you

2.My salary isn't as high as yours

3.Today isn't as cold as yesterday.

5 + 7 = 12 tick nha Nguyễn Văn Tuấn

- Nháy chuột phải rồi nhấn Delete xóa 1 cái đi là được.

Để \(\dfrac{6}{\sqrt{x}}\)đạt giá trị nguyên thì \(6⋮\sqrt{x}\)

\(\Rightarrow\sqrt{x}\in\left\{1;2;3;6\right\}\)

\(\Rightarrow x\in\left\{1;4;9;36\right\}\)

\(A=x^2-x+1=x^2-x+\dfrac{1}{4}+\dfrac{3}{4}=\left(x-\dfrac{1}{2}\right)^2+\dfrac{3}{4}\ge\dfrac{3}{4}\)

Dấu "=" xảy ra khi x=1/2

Vậy Min_A=3/4

\(B=x^2-5x-2\)

\(=x^2-5x+\dfrac{25}{4}-\dfrac{33}{4}\)

\(=\left(x-\dfrac{5}{2}\right)^2-\dfrac{33}{4}\ge-\dfrac{33}{4}\)

Dấu "=" xảy ra khi x=5/2

Vậy Min_B=-33/4

a,

\(\left(\dfrac{-2}{3}+\dfrac{3}{7}\right):\dfrac{4}{5}+\left(-\dfrac{1}{3}+\dfrac{4}{7}\right):\dfrac{4}{5}\)

\(=\left(\dfrac{-2}{3}+\dfrac{-1}{3}+\dfrac{3}{7}+\dfrac{4}{7}\right):\dfrac{4}{5}\)

\(=\left(-1+1\right):\dfrac{4}{5}=0\)

b,

A = \(\dfrac{x^3-27}{x-3}+5x\)

= \(\dfrac{\left(x-3\right)\left(x^2-3x+9\right)}{x-3}+5x\)

= x² + 3x + 9 + 5x

= x² + 8x + 9

= x² + 2x.4 + 8 + 9

= (x+4)² + 9 \(\ge\) 9

Dấu "=" xảy ra khi x = -4

a) \(\left(-\dfrac{2}{3}+\dfrac{3}{7}\right):\dfrac{4}{5}+\left(-\dfrac{1}{3}+\dfrac{4}{7}\right):\dfrac{4}{5}\)

= \(\left(-\dfrac{2}{3}+\dfrac{3}{7}-\dfrac{1}{3}+\dfrac{4}{7}\right):\dfrac{4}{5}\)

= \(0:\dfrac{4}{5}\)

= 0

b) \(\dfrac{5}{9}\left(\dfrac{1}{11}-\dfrac{5}{22}\right)+\dfrac{5}{9}\left(\dfrac{1}{15}-\dfrac{2}{3}\right)\)

= \(\dfrac{5}{9}:\left(\dfrac{1}{11}-\dfrac{5}{22}+\dfrac{1}{15}-\dfrac{2}{3}\right)\)

= \(\dfrac{5}{9}:-\dfrac{81}{110}\)

= \(-\dfrac{550}{729}\)