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Solve for x: 2x^2 = 5x + 12

The first step to solving any equation is to work out what kind of equation it is. As this particular equation has only x's and numbers, and it has a x 2 term, we know that it is quadratic.Now that we know t...
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Answered by Samuel P. • Maths tutor
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What is the difference between a valid argument and a sound argument?

First, let's be clear what an argument is. An argument is a set of claims intended to establish the truth of another claim. The set of claims are the premises of the argument, and they are intended to establ...
TD
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Solve the simultaneous equations A and B: [A] 2x + y = 18 [B] x - y = 6

[A] 2x + y = 18 [B] x - y = 6Rearrange [A] to make y the subject 2x + y = 18minus 2x| y = 18 - 2xReplace the value y in [B] with the rearranged [A] x - (18 - 2x) = 6expand brackets| x - 18 + 2x = 6 simplify|...
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Answered by Nichol Y. • Maths tutor
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Jon and Nik share money in the ratio 5 : 2 Jon gets £150 more than Nik. How much money do they share altogether?

If we forget about the £150 more for a second then we can think of some very basic scenarios where the 5 : 2 ratio is satisfied. For example, Jon has £5 Nik has £2 or Jon has £10 Nik has £4 and so on. From t...
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Answered by William S. • Maths tutor
7824 Views

How do you effectively evaluate research?

Thinking of the acronym GRENADE acts as a useful guideline to include higher level evaluation, rather than the basic methodological design criticisms. It helps provide structure to your evaluation and most a...
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Answered by Steff F. • Psychology tutor
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