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We can use the formula method (for solving quadratic equations) to find 'roots' or values of x that satisfy or 'work out' for a given quadratic equation of an unknown variable (say x.) The formula is:x=-b...

The equation for complete combustion is: 

hyrdocarbon + oxygen -> water + carbon dioxide 

A plentiful supply of oxygen is required in order to ensure complete combustion....

Equation 1) x² +y²=5  (Equation 2) y=3x+1

The value of x is the same in both equations, as is the value of y. Therefore we can use one to work out the other. for exa...

What does it mean?

It’s one of the four ‘moods’ in French (the others are: indicative, subjunctive and imperative)

Because it’s a mood...

Most of our characteristics, such as eye colour, are encoded by a pair of alleles. These are different forms of the same gene, one inherited from the father and one from the mother. You can get dominant a...