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What is the difference between permutations and combinations?

The main difference is that order of objects matters for permutations. Both involve choosing k objects from a group of size n. Permutations are used to calculate the amount of possible ways a group can be ma...
OP
Answered by Oliver P. • Maths tutor
5256 Views

How do I analyse a text to highlight and discuss issues of language and gender?

Students may discuss how men and women use language 'differently', by analysing a text in a number of ways. Students may examine differences in the following areas of language: lexis and semantics (the vocab...
HD
3615 Views

Explain how the left ventricle of the heart creates higher blood pressure

The left ventricle has a thicker muscular wall and therefore produces stronger contractions.
JC
Answered by Jess C. • Biology tutor
20297 Views

What is the importance of maintaining a constant body temperature in mammals?

It's very important to maintain the optimum body temperature in mammals, in particular in relation to enzymes and enzyme controlled processes. There will be the optimum temperature for enzymes where they wor...
AA
Answered by Aia A. • Biology tutor
37511 Views

Find y in terms of x for the equation 2x(dy/dx) + 4y = 8x^2

divide through by 2x to get: dy/dx + 2y/x = 4x this is now in the form of dy/dx + P(x)y = Q(x) intergrating factor = exp( integral(P(x)) dx ) = exp( integral(2/x) dx ) = exp( 2 ln(x) ) = x 2 therefore d( (x ...
TE
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