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What do I do when quadratic equations aren't written in the standard format ax^2 + bx + c = 0 ?

This isn't a trick so much as a way to let you show you can think for yourself. You might be thrown off initially if a quadratic equation is in a format that you don't recognise, but usually all it takes is ...
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Answered by Helena K. • Maths tutor
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How do I use the extracts in the source booklet in my answers?

GCSE History is great because it lets you work like a real life historian, examining evidence from the past and weighing it up! The Sources paper is an important part of this, and it lets you show off your a...
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Answered by Helena K. • History tutor
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What is an alkene and how might one be identified?

Alkenes are a family of hydrocarbons (compounds made up of only hydrogen and carbon atoms) that all share the same chemical formula, similar chemical properties (due to same functional group) and trends in p...
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Answered by Natasha C. • Chemistry tutor
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White paint costs £2.80 per litre. Blue paint costs £3.50 per litre. White paint and blue paint are mixed in the ratio 3 : 2 Work out the cost of 18 litres of the mixture.

To work out how many litres of white and blue paint is needed, use the ratio 3:2. To find the specifc ratio for 18 litres, of paint: 2+3=5, 18/5=3.6 so (3:2) 3.6 becomes 10.8:7.2 (check 10.8+7.2=18). So to d...
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Answered by Aidan D. • Maths tutor
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How does Charlotte Bronte present Jane Eyre as a strong female character?

Jane's strong character is best seen in the context of her gender as she shows traits that trangress and push the boundaries of those expected of Victorian women. She is fiercely independent and she is fearl...
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