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How do we solve simultaneous equations, say for example x + 4y = 20 and 2x - 2y = 10 ?

When it comes to simultaneous equations, there are two methods that we can use to solve them. The first method is called substitution , where we make one of the variables the subject in one of our equations ...
JW
Answered by Jonathan W. • Maths tutor
8371 Views

What are the different ways that energy can be transferred?

There are three methods of energy transfer that we need to learn: conduction, convection, and radiation. 1. Conduction: Heat is thermal energy, and in solids it can be transferred by conduction. Heat is pass...
LM
Answered by Lois M. • Physics tutor
277832 Views

How can I remember when to use 'être' in the perfect tense?

Etre is the auxiliary that is usually used with verbs that mean ' coming ' or ' going ' in French, as opposed to avoir . You can use the ' DR MRS VANDERTRAMP ' acronym to help you remember: D evenir (to beco...
EH
Answered by Elizabeth H. • French tutor
4170 Views

What are the different methods of solving quadratic equations?

For your maths GCSE it is important that you understand the three main methods of solving quadtratics: factorisation, completing the square, and using the quadratic formula. 1. Factorisation: The first step ...
LM
Answered by Lois M. • Maths tutor
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What is the difference between diffusion and osmosis?

Osmosis is the movement of solvent particles (usually referring to water) from an area of low concentration (i.e. lots of water particles) to and area of high concentration (i.e. less water particles and mor...
KM
Answered by Kaat M. • Biology tutor
8669 Views