Top answers

Find the highest common factor (HCF) of 12 and 18.

We start off by drawing attention to the first number in the question, 12. The number can be broken down into multiples by dividing it by the lowest number (that isn't 1): This breakdown is as follows: 12=2*...
JJ
Answered by Jake J. • Maths tutor
38612 Views

Give an example of a strong acid.

Hydrochloric acid is an example of a strong acid because it is completely ionised in water.
MK
Answered by Maria K. • Chemistry tutor
5078 Views

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 ...
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Answered by Jonathan W. • Maths tutor
8436 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
278394 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...
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Answered by Elizabeth H. • French tutor
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