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(simple algebraic substitution equations)
assign each an algebraic term to form equations > footballs = f, tennis balls = tequation 1 > 5f + 3t = £2.30equation 2 > 4f + 2t = £1.80
(you ...

The denominator in this equation is irrational. This can be seen by the fact that we have a surd (root 3) present, which cannot be expressed as a fraction as is therefore not rational.
In order to r...

In order to do this question you want to make sure that both parts of the subtraction are multiplied by the same power of 10.In this case let's make the second part in terms of 10^4. So it becomes 0.5 x 1...