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The sides of an equilateral triangle are given by the expressions x+y, 2y-1 and 3y-2x+1. Find the values of x and y.

This question test knowledge of the geometry of equilateral triangles and the students ability to solve linear equations. First we note that an equilateral triangle has equal sides. Then we can write that x+...
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Answered by Joe S. • Maths tutor
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What is meant by the term genotype and how does this differ from the phenotype?

The genotype of an organism is the combination of alleles, different copies of a gene at the same locus, (from the mother and father) that give rise to a particular trait whereas the phenotype is the observa...
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Answered by Lucy S. • Biology tutor
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Factorise fully 2x^2 -x -4=2 and thus solve for x

Recall that to solve a quadratic it needs to be in the form ax 2 + bx +c = 0, Subtract 2 from each side to get 2x 2 -x-6=0 therefore a=2 b=-1 and c=-6 Solve by considering factors c and a that expand out to ...
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Answered by Lucy S. • Maths tutor
3256 Views

Describe the structure and properties of graphite

Graphite is made from layers of carbon which contain many 6-membered carbon rings (hexagonal). Each layer is held together by each carbon being covalently bonded to 3 other carbon atoms and this leaves a del...
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Answered by Lucy S. • Chemistry tutor
7364 Views

How do you know whether a noun is masculine or feminine in French?

This is a common question from all French students with no straightforward answer. This question can only fully be answered through experience and memorisation of the French nouns with their gender. However,...
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Answered by Natasha G. • French tutor
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