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2x + 3y = 8 and 3x + 2y = 7 find x and y

These are simultaneous equations. To solve them, we need to do something to these equations to that either the coefficents of x or y are the same. So multiply each equation by a suitable number, a good choic...
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Answered by Tara K. • Maths tutor
17505 Views

How do you create a 1 sentence with a relative clause out of two separate sentences?

Relative clauses in Russian are created by using the relative pronoun 'который'. This pronoun has adjectival endings and refers to the noun that comes directly before it. It agrees with this noun in gender a...
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Answered by Hugh O. • Russian tutor
2016 Views

Explain the lock and key hypothesis of enzyme function

To start, it is important to have a clear understanding of what an enzyme is. An enzyme is a biological molecule which speeds up the rate of a reaction without being changed or used up in the process. Each e...
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Answered by Emma P. • Biology tutor
10059 Views

2x^2 - 16x + 32

Solution: x=4. This can be shown by factorisation or applying the quadratic formula.
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Answered by Nick O. • Maths tutor
4320 Views

I keep running out of time in exams, how can I avoid this?

Most GCSE papers are split between a number of short answer questions worth a few marks and then one or two longer 'essay-style' questions which are worth considerably more. The key thing to focus on is ensu...
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Answered by Nathan W. • History tutor
4680 Views