Foundation November 2024 Paper 1 Q11

11 Make \(d\) the subject of the formula \(\quad c = 8d + 5\)

(2)

Mark scheme

Scheme	Marks
\(c - 5 = 8d\) oe or \(-8d = -c + 5\) or \(\dfrac{c}{8} = d + \dfrac{5}{8}\) oe or \(\dfrac{c - 5}{8}\) oe	M1
Correct answer scores full marks (unless from obvious incorrect working) Answer: \(d = \dfrac{c - 5}{8}\)	A1
	(2)
	(2 marks)

A1: accept \(d = \dfrac{c}{8} - \dfrac{5}{8}\) oe or \(d = \dfrac{5 - c}{-8}\) oe

(must see \(d = \ldots\) on answer line or in working)