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Work out the value of 2^14 ÷ (2^9)^2

2 14 ÷ (2 9 ) 2 = 2 14 ÷ 2 18 = 2 -4 = 1/(2 4 ) = 1/16 (9x2=18) (14-18=-4) (2 4 =2x2x2x2=16)
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Answered by Hannah G. • Maths tutor
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Discuss one strength and one limitation of the biological approach (4 marks)

The biological approach takes a deterministic stance, explaining all human behaviour as controlled by some component of the person's physiology, such as genetics or neurotransmitters. It is therefore consist...
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Answered by Hannah G. • Psychology tutor
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Sketch the graph of y = 5 - 7x

The key points with graph sketching are to think about the shape of the curve, any turning points, and the intercepts with the y- and x- axes. This curve is linear in x, and is therefore a straight line (obv...
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Answered by Jonah A. • Maths tutor
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Simplify the following algebraic fraction; (3x^2 - x - 2) / ((1/2)x + (1/3)).

First we need to factorise the numerator into two expressions. We can see one expression must start (3x + ?) and the other therefore must hold (x + ?), we know this because the two brackets must multiply tog...
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Answered by Bobbi L. • Maths tutor
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How are arteries adapted to carry blood away from the heart?

Since arteries need to pump blood to the entire body under high pressure, they are very strong with thick muscular walls. Artery walls are also elastic, which allows them to stretch and spring back in order ...
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Answered by Maxwell C. • Biology tutor
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