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How do you solve these simultaneous equations? 4x + 5y = 8; 2x + 3y = 5

By elimination:(eq1) 4x + 5y = 8(eq2) 2x + 3y = 5By eye you can see that 2x multiplied by 2 is 4x.If we multiply the whole of (eq2) by 2 we get:(eq2.1) 4x + 6y = 10(eq1) 4x + 5y = 8If we subtract the whole o...
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Answered by Wendy L. • Maths tutor
6135 Views

Explain how a protein is synthesised

The process starts in the nucleus A gene (section of DNA coding for a protein) unwinds, and the 2 DNA strands making it up unzip Transcription then occurs - one DNA strand is used as a template to make mRNA ...
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Answered by Peter P. • Biology tutor
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We've learned a bit about DNA and genes but how does inheritance work?

Okay so, so far you've probably covered a bit about DNA, how it's stored in chromosomes and what genes are for. Inheritance is now simply about how a gene that comes from your mum and a gene that comes from ...
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Answered by Athif H. • Biology tutor
3268 Views

When would you use the imperfect tense, and how do you construct it?

It is used when:-Talking about something that used to happen, i.e. was ongoing for a period of time-The weather in the past-Physical description of something in the past-Talking about something that was happ...
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Answered by Wendy L. • French tutor
2308 Views

C. Explain why international relations improved in the period 1924-28 (12) (Edexcel History A)

An answer at an appropriate level, but top band: There were a variety of reasons why relations between nations improved in the period 1924-1928. The League of Nations had been formed during the Versailles Co...
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Answered by Toby L. • History tutor
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