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Algebra is always a bit confusing when you first learn is as it's the first time letters come into maths, here is the mainthing you should remember: you have to do the same thing to both sides of the equatio...

Jodie works for a bookshop, she is paid £6.50 an hour plus 5% of the cost of each book she sells. On Saturday she worked for 3 hours and sold £220 worth of books. How much did she earn on saturday? Here we n...

Fraction questions can confuse a lot of students when phrased in this way, a good place to start therefore is to think of the number 9 as the fraction 9/1. Now we know the rule that when you have a fraction ...

Differentiaiton from principles requires the use of the following formula which is provided in the formula booklet: f'(x) = lim h->0 ((f(x+h) - f(x))/(h)) Consider a function: f(x) = 6x 2 Clearly we know ...

multiply with conjugate 5-root3 such that the denominator gets rational (5-root3)^2/((5+root3)(5-root3)) = (25-10root3+3)/(25-3)=(28-10root3)/22 = 14/11 - 5root3/11