Một hộp đựng tám thẻ ghi số từ 1 đến 8. lấy ngẫu nhiên từ hộp đó 3 thẻ, tính xác suất để tổng các số ghi trên 3 thẻ bằng 11

Since when you knew Mary? -I have known her since I was in the high school.

\(\sqrt{2x}\ge\sqrt{x}\)

1) \(2x^2\)\(+3x-27\)

\(=2x^2+6x-9x-27\)

\(=2x\left(x+3\right)-9\left(x+3\right)\)

\(=\left(2x-9\right)\left(x+3\right)\)

2) Nghiệm lẻ

3)\(2x^2-5xy-3y^2\) \(\)

\(=2x^2-6xy+xy-3y^2\)

\(=2x\left(x-3y\right)+y\left(x-3y\right)\)

\(=\left(x-3y\right)\left(2x+y\right)\)

(x-1)(x+1)(x+2)

\(=(x^2-1)\left(x+2\right)\)

\(=x^3+2x^2-x-2\)

(x-2)(x-3) - (x-7)(x+4) = 5-x

\(\Leftrightarrow\)\(x^2-3x-2x+6-x^2-4x+7x+28=5-x\)

\(\Leftrightarrow\)\(x^2-x^2-3x-2x-4x+7x+x=5-28-6\)

\(\Leftrightarrow\) \(-x=-29\)

\(\Leftrightarrow\)x\(=\)29

Put the correct form of verbs:

"Last night's first-ever ball game at Pacific Bell Park began with Willie Mays and ended up with a crowd of more than 40,800 strolling into a warm San Francisco night after an 8-3 Giants win." — Saturday, April 1, 2000

No one wanted (miss, to miss, missing) the opening game at PacBell Park¹. Fans didn't mind (wait, to wait, waiting) in line to buy the last few tickets for sale. Fans enjoyed (look at, looking at, to look at) the nine-foot statue of Willie Mays at the entrance.

The real Willie Mays was standing on the pitcher's mound getting ready (throw, to throw, throwing) the first pitch. Willie Mays was remembering (hit, to hit, hitting) home runs in the old park. Several people mentioned (miss, to miss, missing) the old park, but not the cold weather conditions there.

Most people decide (take, to take, taking) public transportation to the game. Some admitted (like, liking, to like) the experience. Others risked (drive, to drive, driving) and later found it difficult to park. Cal Train regretted not (plan, planning, to plan) for the large number of fans who wanted to take the train. In the future, Cal Train plans (add, to add, adding) more trains. Planners suggested (arrive, to arrive, arriving) at the park early to avoid traffic problems. They anticipated (have, having, to have) a "full house".

Câu cuối t nghĩ k cần điền nữa đâu

I. Điền giới từ phù hợp:

1/ Do you go to school on foot or by bike?

2/ My house is at Le Loi Street, her house is at 9 Le Lai Street.

3/ We are living with our parents in Quang Ngai town.

4/ I'm in class 7A.

5/ Dictionaries are on the shelves on the left of the room.

6/ She is interested in literature, but we are fond of Math.

7/ My birthday is on May first.

8/ Is Lan's birthday in March.

9/ Yen has Math and Music on Monday.

10/ Tom is good at physics.

11/ What do you often do at recess?

12/ Tom lives in the city, but Mary lives on a farm.

II. Choose the best answer to fill the blanks balow.

1. She .............. goes tl the cinema with her friends, about once or twice a month.

a. always b. usually c. often d. somtimes

2. Linh likes .....................

a. going shopping b. go shopping c. going shop d. go shop

3. What's your favourite sport?

- My favourite sport is ............................

a. swim b. swimming c. swimmer d. swims

4. Are they .................. picture?

a. draw b. drew c. drawing d. draws

5. She is speaking. Please listen to ............................!

a. She b. him c. Hers d. her