4MA0 Higher June 2015 Paper 4 Q9

EdexcelHigherOld spec4 marksLinear Inequalities

(a) Solve the inequalities \(-5 \lt x + 4 \leqslant 3\) (2)

(b) \(n\) is an integer.
Write down all the values of \(n\) that satisfy \(-3 \leqslant n \lt 2\) (2)

Mark scheme (a)

Scheme	Marks
\(-5 - 4 \lt x \leqslant 3 - 4\)	M1
\(-9 \lt x \leqslant -1\)	A1
	(2)

Notes

M1: subtraction of 4 from either side in an inequality or one side of inequality correct (eg \(x \leqslant -1\)) or for −5−4 (= −9) and 3−4 (= −1)

A1: Accept \(x \gt -9\), \(x \leqslant -1\)

Scheme	Marks
−3, −2, −1, 0, 1	B2
	(2)