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Solve the equations x^2+y^2=13 and x-2y=1 simultaneously.

Rearranging the second equation gives x=2y+1. Substituting this into equation 1 gives (2y+1)²+y²=13.Rearrangingthis and factorising the quadratic equation gives (5y-6)(y+2)=0, giving...

Answered by Phoebe S. • Maths tutor

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Explore how Beckett uses repetition in 'Waiting for Godot'.

Beckett uses repetition in speech, stage actions, and the overall structure of the play, to demonstrate the futility and circularity of existence. Many of the characters repeat their language; Acts 1 and ...

Answered by Katie H. • English tutor

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There are three halogenoalkanes with halogens F, Br and I. Each undergo an SN2 reaction. How does the rate of reaction differ between the three halogenoalkanes?

The Iodoalkane will have the fastest rate of reaction. The Bromoalkane will have the second fastest, while the Floroalkane will have the slowest. This is because the atomic radius increases from Florine t...

Answered by Rosalie G. • Chemistry tutor

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