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How do I solve simultaneous equations?

Simeltanous equations are a pair of equations that have 2 unknows. In order to solve a simelatneous equation 1 of the unknows must be eliminated. This can be done by either: 1. Substitution - This involves p...
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Answered by Rory B. • Maths tutor
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Integrate the following function by parts and reduce it to it's simplest form. f(x) = ln(x).

First note that ln(x) = 1 ln(x), this is in the form u dv/dx. Let dv/dx = 1 and u = ln(x). du/dx = 1/x from the standard results and v = x by integration. Substituting into the formula integral(u dv/dx)dx = ...
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Answered by Ryan B. • Maths tutor
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Can you explain the narrative techniques in The Turn of The Screw?

The governess is what we would call an unreliable narrator. She is unreliable for a variety of reasons- the most popular reason amongst critics being that she is insane. Following the psychological analysis ...
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What is an Extraneous Variable?

An Extraneous Variable is something that the experimenter cannot control, which can have an effect on the overall outcome of the experiment. The main four extraneous variables are demand characteristics, exp...
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Answered by Lydia S. • Psychology tutor
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How does DNA code for proteins?

What is DNA? DNA is the chemical used to store genetic information (inherited traits and characteristics) in the body. The shape of DNA is a double helix (two complementary chains, interwoven). Every chain h...
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Answered by Patrick G. • Biology tutor
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