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Solve the simultaneous equations - x+y=2 and 4y^2 - x^2 = 11

The objective of simultaeous equations is to be able to work out two unknowns by using two equations in which they are both involved. The first step is to label the equation x+y=2 as equation 1 and 4y 2 - x ...
KC
Answered by Keshlee C. • Maths tutor
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What is the role of the kidney in water homeostasis?

The kidney has several functions, but in this short paragraph I am going to explain about it's principal function- controlling water levels in the body. Imagine you are in a desert and you have not had a dri...
GR
Answered by Grace R. • Biology tutor
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Find the nth term in the series: 3, 7, 11, 15, 19

Find the difference between each value. 7-3, 11-7 ... For this series the difference is 4. The nth term is then 4n + or - a constant. The series is 3, 7, 11.. each of these is 1 below a multiple of 4. 4 1- 1...
HW
Answered by Hermione W. • Maths tutor
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When I plan for practice questions, I find it hard to apply the plans to questions in the real exam because they're not exactly the same. How can I help this?

Rather than planning for different exam-style questions, focus on planning for a topic . A topic can be defined as either a theme, character or plot-thread that is easily identifiable. For example, in Romeo ...
OC
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Could this all be a dream?

MOORE’S REFUTATION Moore believes that contrary to Descartes’ refutation, which I have glossed over for practical reasons, there is no need to appeal to God to prove that the outer world exists. To prove thi...
GL
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