Foundation November 2021 Paper 3 Q12

12 Rearrange this formula to make \(w\) the subject.

\[P = 2h + 2w\]

[2]

Mark scheme

Answer	Marks	Part marks and guidance
\(w = \dfrac{P - 2h}{2}\) oe	2	M1 for \(\dfrac{P - 2h}{2}\) oe or correct first step e.g. \(P - 2h = 2w\) or \(\dfrac{P}{2} = \dfrac{2w}{2} + \dfrac{2h}{2}\) or for next correct step towards isolating \(w\) following first error	Note \(w = \dfrac{2h - P}{-2}\) oe is correct May be \(\dfrac{P}{2} = w + h\) e.g. Following \(2w = P + 2h\) \(w = \dfrac{P + 2h}{2}\)