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To answer this question first we need to work out how many CDs we have in total. We do this by adding up the number of CDs in each category:Total = 2 + x + 2x + 5.
We can simplify this to give:Total ...

The first step of looking at a question like this is to highlight all the important information in the question. We are told that the square has an area of 64 cm² so what can we infer about the...

A determiner is a grammatical word that introduces a noun. For example, a, the, many, every etc. Determiners a/an are called indefinite articles, which means that there is no definite reference to what th...

One strength of a laboratory experiment is they allow a high level of control over the procedure so all participants will witness the same standardised procedure. This means the procedure can be repeated ...

In a laboratory experiment a participant will witness a controlled incident which is linked to a crime. This incident is artificially set up by the researcher in a laboratory setting. The witness may be s...