What is algebra and why do we use it?
Algebra is a part of mathematics in which letters or symbols are used to represent either a known constant or an unknown value. Algebra is often used within formulae in which we can extrapolate an answer, an example being the 'Quadratic Equation'.
Related Maths GCSE answers
All answers ▸Explaining how to solve simultaneous equations
There are 10 boys and 20 girls in a class. In a class test, the mean score of the boys is 77. The mean score of the girls is 80. What is the mean score of the whole class?
There are 10 beads in a bag. Four beads are green, six are black. If three beads are taken at random without replacement, what is the probability that they are the same colour?
How do you convert fractions to decimals? For example. Convert 13/20 to a decimal.