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Describe how the body maintains its water concentration

Homeostasis- is the principle by which the body maintains a constant internal environment in order to provide optimal conditions for the cells and enzymes to function. Water is taken in via drinking and as a...
RA
Answered by Rayyan A. • Biology tutor
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Expand and simplify (x+6)(x+4)

Answer: x 2 +10x+24 Method: A handy way of knowing how to expand brackets involves the pneumonic FOIL: - F stands for First, so we multiply the first term in the first bracket by the first term in the second...
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Answered by Emma M. • Maths tutor
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How do I multiply or divide fractions without a calculator?

For multiplication: Firstly, write out the sum you are trying to do, for example 3/4 X 1/8 Then, times the top numbers by each other and the bottom numbers by each other 3 x 1 = 3, 4 x 8 = 24 Then, rewrite t...
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Answered by William M. • Maths tutor
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What is urbanisation?

Before we look urbanisation, we have to define what we mean by urban and what we mean by rural. A rural area is an area of countryside, so for example a village or a hamlet. An urban area is a built up area,...
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Answered by Alice P. • Geography tutor
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Work out the value of x and y in the parallelogram ABCD.

5x - 20 = 2x +43 -> 5x-2x= 43+20 -> 3x=63 -> x=21 therefore x=21 (2x+43) + (4y-5x)=180 -> 2x+43+4y-5x=180 (because adjacent angles in a parallelogram equals 180) 4y-3x=180-43 -> 4y= (100-43)+3...
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Answered by Kwarteng S. • Maths tutor
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