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How to solve the simultaneous equations 3x+2y=7 and 5x+y=14

Firstly we rearrange one of these equations so that we have y on one side of the equation on its own. Let's do this with the second equation.

So from 5x+y=14, we can minus 5x from both si...

IB
Answered by Imogen B. • Maths tutor
8319 Views

What is meant by the term polygenic inheritance? [2 marks]

This term refers to the idea that a single characteristic is encoded for my multiple genes at different loci. This gives rise to continuous

OF
Answered by Odette F. • Biology tutor
6637 Views

Explain how a vaccination prevents infection [3 marks]

The main way in which vaccinations prevent infection is by causing white blood cells to produce antibodies. These antibodies are produced rapidly upon re-infection and...

OF
Answered by Odette F. • Biology tutor
11309 Views

用括号中的词语“只要……就……”重写下面的句子，并保持句子原意:"凡是自己想做又能够做的都是休闲。"

只要自己想做又能够做的就是休闲。

(This is a question from A level Chinese Test Paper 2 - Reading and Writing)

MS
Answered by Mingfang S. • Mandarin tutor
18293 Views

What is diffusion? (GSCE: OCR, Edexcel, AQA)

Definition: diffusion is the spreading out of particles from an area of high concentration to an area of low concentration

The theory:

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NF
Answered by Ned F. • Biology tutor
11674 Views

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