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What is the centre and radius of the circle with the equation x(x-2)+y(y+6)+4=0 ?

x(x-4)+y(y+6)+4=0x^2-4x+y^2+6y+4=0x^2-4x+4+y^2+6y+9=9(x-2)^2+(y+3)^2=9=3^2centre (2,-3) radius 3
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Answered by Lauren W. • Maths tutor
3816 Views

Discuss the following statement in light of ‘Dracula’: Women must either conform to society or face social expulsion.’

Conservative ideals of women appraise conventional piety to encourage such ideology, and in doing so, naturally demonise any contrary versions of womanhood to the status quo. The archetypal chaste women, at ...
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Answered by Iesa K. • English tutor
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In what ways did Germany contribute to the outbreak of WW1

Germany was an aggressive power during the July crisis of 1914. Austrian diplomats noted that the German government was pushing to use the assassination of Franz Ferdinand to start a war of aggression with F...
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Answered by Sam B. • History tutor
4034 Views

What is the role of the heart in the formation of tissue fluid?

Ventricles contraction produce high blood pressure.This forces water and other substances out of the capillaries
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Answered by Aya A. • Biology tutor
13648 Views

I struggle with modelling with differential equation, is there an easier way of interpreting this type of wordy question?

I would let the student identify what the important elements of the question are and encourage them to assign each with a term or other mathematical notation. I would then go through these to make sure the s...
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Answered by Christopher L. • Maths tutor
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