Tính giá trị của biểu thức A= a^3 -3a^2+3a+4 với a=11

___ (we / work) very hard this week to get everything ready for the conference on Monday.

3x-2y/4=z-2x/5=4y-3z/2 và x+2y-3z=-12 help me I so need

A: Helen, this is my cousin, Greg. He's a maths student. B: Hello, Greg. Where ___ (you / do) your degree? C: At London University.

I. Arrange the words to make sentences. 1. way /orthers /community /a /help /service /is /great /to /. 2. they /community /people /because /volunteer /want /improve /to /their /. 3. encouraged /books /people /street children /we /to /donate /and clothes /to 4. what /to /help /we /can /do /the enviroment /clean /? 5 work /done /you /ever /have /volunteer /any /? 6. free time /Joe /doing /work /spent /most /at /his /local hospital /a /of /volunteer.

A: Please don't eat all the ice cream. I need some tomorrow. B: ___ (we / not / eat) it all. Just a bit.

Phân tích các nhân tố giao tiếp trong câu sau : Em tưởng nước giếng sâu Em nối sợi gầu dài Ai ngờ nước giếng cạn Em tiếc hoài sợi dây

My father started to give up smoking last year. My father........

A: Could I watch something on another channel? B: Sure. ___ (I / not / watch) that programme.

Căn x^2-3x-2=x-2 giải giúp mk vs ạ