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Compare the medical uses of ultrasound and X-rays. Your answer should include the risks, if any, and precautions, if any, associated with the use of ultrasound and X-rays. [6 marks]

For six mark questions, it is important to remember that your quality of written communication will be assessed. This basically means that you're spelling, punctuation, use of terminology and how you form se...
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Answered by Nicholas M. • Physics tutor
17170 Views

What is the difference between the short run and long run?

The short run and long run is not determined by a set period of time, but rather by which factors of production are fixed. In the short run, at least one factor of output is fixed. Whereas in the long run, n...
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Answered by Zoe C. • Economics tutor
4164 Views

A is the point with coordinates (1, 3) B is the point with coordinates (–2, –1) The line L has equation 3y = 4 – 2x Is line L parallel to AB?

No it is not parallel, here is the reasoning. First we work out the gradient of the line AB. We do this by using the gradient formula (Y2-Y1)/(X2-X1). Our points are A=(1,3) rewritten as (X1,Y1) and B=(-2,-1...
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Answered by Emily L. • Maths tutor
14017 Views

Show that (4+√12)(5-√3)= 14+6√3

First, expand out the brackets. Initially, this will give you 20 - 4√3 + 5√12 - √36. √36 is the equivalent of 6, now giving up 20 - 4√3 + 5√12 - 6. We can combine the 20 and the 6 to give us 14 - 4√3 + 5√12....
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Answered by Lucy H. • Maths tutor
10245 Views

Factorise x²+5x+6.

You need to find two numbers that multiply to make 6 and add to make 5. Usually it's easier to find a correct multiplication and check that it satisfies the addition. Here the options are 6&1 or 2&3,...
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Answered by Elliot D. • Maths tutor
13398 Views