waecmaths question:
Represent the inequality $-7<4x+9\le 13$ on a number line
Option A:
Option B:
Option C:
Option D:
waecmaths solution:
$\begin{align} & -7<4x+9\le 13 \\ & -7-9<4x\le 13-9 \\ & -16<4x\le 4 \\ & -4<x\le 1 \\\end{align}$option B
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