Edexcel IGCSE Math A 2.3.E Deriving Formulae & Expressions
Practise translating totals, rates, function machines and geometric relationships into simplified algebraic formulae.
- Syllabus
- First assessment 2018
- Course
- Math A 4MA1
- Level
- Foundation
Exam points
- translate each stated quantity into an algebraic term before combining the total
- form a formula from a verbal rule, rate or function-machine sequence
- substitute geometric constraints and simplify step by step to prove a stated formula
2.3.E Derive a formula or expression question 1
[Maximum number: 2]
Write an expression, in terms of x, for T.
x+(x+4)+3(x+4)
=x+x+4+3x+12
=5x+16
Final answer:
5x+16
M1 for any two of x, x+4, or 3(x+4) oe.
A1 any correct expression.
SC B1 for x+4x+3×4x or 17x.
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