(2√x/√x-2)+(4/2-√x)+√x

Các bạn giải hộ tớ bài này với ạ, tớ cảm ơn!

Đề: Chứng tỏ rằng trong mặt phẳng tọa độ Oxy, 3 điểm A(2;6), B(-2;11), C(6;1) thẳng hàng. Gợi ý: cm BA + AC =BC

_______ is increasing, which results from economic crisis.

A. Employment

B. Unemployed

C. Unemployment

D. Employ

Reasons why I would buy an iWatch

As a principal and a teacher, my days are incredibly busy. I often don’t have the time to check messages (1) _______ my phone or computer during the day because there is rarely a free moment during my workday. This has often (2) _______ to my missing important email messages, phone calls, or text messages from my family members or schoolchildren’s parents.

I too often (3) _______ to feel the buzzing of my phone in my (4) _______ , or if I am incredibly busy, I am not able to pull it out to look at the reason for the alert. I would love the ability to have alerts right on my (5) _______ to glance at really quickly. This would help me, even during the busiest parts of the day, to quickly know (6) _______ there is an important message or phone call that I need to attend to.

One of my least favorite parts of the day is sorting through my email box at the end of a busy school day of all the messages that backed up during my day of eaching. How (7) _______ would it be to be able to (8) ______ email and other messages with a quick flick of a button on the iWatch as they arrive during the day? I imagine the iWatch buzzing with an incoming email and then offering buttons to quickly archive, delete, or send the message to a specific (9) _______. Being able to (10) _______ incoming messages as they arrive in split seconds throughout the day would save me from having to spend the time sorting through all alerts and messages at the end of the day.

Question 2: 

A. lead

B. led

C. leading

D. been leading

Giá trị của biểu thức m + n, nếu m = 165 và n = 317:

A. 152

B. 482

C. 322

D. 428