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Find the coordinates of the centre C and the length of the diameter of a circle with the equation (x-2)^2 + (y+5)^2 = 25

Equation of a circle -> (x-a) 2 + (y-b)^2 = r 2 where the centre = (a,b) and the radius = r Thus using the equation above we can conclude that the centre is (2,-5) In order to find the diamerer fo the cir...
MC
Answered by Michael C. • Maths tutor
6118 Views

Solve 9x - 3 = 4x + 17

The objective of the question is to find an answer to x = ?, where ? is a number. Start by 'moving' all the x's to one side of the equals sign and all the numbers to the other. This can be done by adding / s...
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Answered by Michael C. • Maths tutor
5795 Views

How is the structure of a red blood adapted to its function?

Red blood cells are shaped like a biconcave disc - increases SA:volume ration -> increase surface for oxygen to diffuse in and out of cell Red blood cells are very small - 7um, compared with 40um average ...
NB
Answered by Norbert B. • Biology tutor
15441 Views

How to write an interview?

It is crucial to know and recognise the text type conventions - they are the basis in Paper 2. There is much guidance in the syllabus and online, however, when explained in person with examples it becomes mu...
UA
Answered by Urte A. • French tutor
3495 Views

Translate the following sentences into French. [10 marks]

My father is tall. Mon père est grand. At school I like maths and science . A l'école, j'aime les mathématiques et les sciences. I listen to music in the evening. J'écoute de la musique le soir. In my town t...
TD
Answered by Tutor70478 D. • French tutor
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