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A right-angled triangle has an adjacent of (x + 1) and (x - 1). (a) Find the length of the hypotenuse in terms of x. (b) Explain why the triangle can't be an isoceles triangle.

(a). Using Pythagoras' Theorem, (x + 1) 2 + (x - 1) 2 = x 2 + 2. (b). (x + 1) cannot = (x - 1) for any x.
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Answered by David A. • Maths tutor
3186 Views

How can I extract essential information from a book in as little time as possible?

Sometimes you need to read several books for an essay and it is difficult to read them all without waisting some precious time you could spend planning your essay or writing it. Reading should not take more ...
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Answered by Antoine C. • History tutor
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Parlez de votre passion

Cela fait depuis que je suis très jeune que je suis un passionné d'histoire et surtout des guerres Napoléoniennes. De ce fait, j'étudie l'histoire à l'Université de Durham au Royaume Uni. Rien ne m'intéresse...
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Answered by Antoine C. • French tutor
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You and your brother have your pocket money split in the ratio 2:7. If your brother receives £42, how much do you receive?

Ratios are best thought of as how to split up one total amount into different portions. People often like to think about a cake; in this particular scenario we are splitting a cake with 9 slices (7 + 2) into...
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Answered by Sam R. • Maths tutor
4524 Views

Name and describe each of the tests used to test for the presence of :starch, lipids and proteins.

Starch- add iodine to the sample. A positive result will give a blue/black solution.Lipids- Add ethanol to the sample and shake well then add water. A positive result indicating the presence of a lipid will ...
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Answered by Annabel T. • Biology tutor
15789 Views