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How do you solve a quadratic inequality?

Treat it as a normal quadratic equation and solve by factorising: eg. x² - 5x - 24 > 0 x² - 5x - 24 = 0 (x + 3)(x - 8) = 0 x = -3 or x = 82) Sketch the curve, showing the po...

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How do I plan a a persuasive response to English Language Paper 2 Question 5 (AQA)?

The first thing you need to do is read the question. For example: ‘Homework has no value. Some students get it done for them; some don’t do it at all. Students should be relaxing in their free time.’ Writ...

Answered by Vicki L. • English tutor

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Explain how a change in one amino acid in an enzyme molecule can stop the enzyme working.

This is because the altered amino acid codes for a different protein (an enzyme is a protein) to be created. This protein has a different 3D structure and shape meaning that it's active site, where the su...

Answered by Beatrix T. • Biology tutor

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Tim flies on a plane from London to Tokyo. The plane flies a distance of 9000 km. The flight time is 11 hours 15 minutes. Work out the average speed of the plane in kilometres per hour.

Speed = Distance/TimeSpeed = 9000/11.25Speed = 800 km/h

Answered by Nicholas E. • Maths tutor

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Describe and explain how the structure of the small intestine is adapted for absorbing the products of digestion.

The small intestine's structure is adapted in two main ways to aid in the absorption of the products of digestion. Firstly, the small intestine's surface is covered in villi which help to increase the sur...

Answered by Tom D. • Biology tutor

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