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How do you solve quadratic and linear simultaneous equations?

For two linear simultaneous equations, two algebraic methods can be used to find solutions.The first is elimination, which is usually a lot quicker. Elimination involves subtracting one equation form the oth...
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Answered by Jack A. • Maths tutor
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What are volumes of revolution and how are they calculated?

Volumes of revolution are contructed by a fuction of x, y=f(x), rotated 360 degrees, or 2pi radians around the x asxis. For example, a function of y=2 would create a cylinder of radius 2 in its volume of rev...
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Answered by Jack A. • Maths tutor
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What is Descartes' "cogito" argument?

In his search for unassailable knowledge, Descartes reaches in his first Meditation a hurdle in the form of his deceiving demon thought experiment. The demon Descartes imagines is one who deceives him about ...
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Answered by Ryan A. • Philosophy tutor
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N = 2A + B. A is a two-digit square number. B is a two-digit cube number. What is the smallest possible value of N?

A is a 2-digit square number. In order to find the smallest N number we want to find the smallest possible 2-digit sqaure number. To sqaure a number means to multiply this number by itself, e.g. the square n...
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Answered by Silvia K. • Maths tutor
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Describe and explain the trend in reactivity of Group 2 elements with chlorine as the group is descended?

As group 2 in the periodic table comprises of metals, the reactivity of group 2 elements towards chlorine increases when working our way down the group 2 metals. This is compared to non-metals when the react...
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Answered by Silvia K. • Chemistry tutor
31801 Views