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The term containing x4y5 will be C(9, 5)x4(-2y)5 = (9!/(5!4!))x4(-2)5y5The coefficient of which will be 1...
There are (48/8)*3=18 boys. Since the ratio of boys to girls is 8:3 you divide the number of girls by 8 which gives 6 and then multiply by 3 to give the number of boys.
The first thing to keep in mind for source questions is to cover all the sources in your answer equally. In an A Level question, you will usually be given 4 and it's perfectly fine to structure your answe...
Firstly; the perfect tense is a compound formation, meaning there are two parts to its formation. This includes the auxiliary verb, namely 'avoir' or 'être' plus the past participle which is the conjugate...
Mon pere m'aidera avec mon travail
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