S=12(u+v)t\displaystyle S = \frac{1}{2}(u + v)tS=21(u+v)t
Work out the value of S S\,S when u=10u = 10u=10, v=20v = 20v=20 and t=7t = 7t=7
Practise Edexcel GCSE Maths Substitution with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.