4400 Higher November 2006 Paper 3 Q2
2 Rectangular tiles have width \(x\) cm and height \((x + 7)\) cm.

Diagram NOT accurately drawn
Some of these tiles are used to form a shape.
The shape is 6 tiles wide and 4 tiles high.

Diagram NOT accurately drawn
(a) Write down expressions, in terms of \(x\), for the width and height of this shape. (2)
(b) The width and the height of this shape are equal.
(i) Write down an equation in \(x\).
(ii) Solve your equation to find the value of \(x\). (4)
| Scheme | Marks |
|---|---|
| \(x + x + x + x + x + x\) or \(6x\) | B1 |
| \(x + 7 + x + 7 + x + 7 + x + 7\) or \(4(x + 7)\) or \(4x + 28\) | B1 |
| (2) |
| Scheme | Marks |
|---|---|
| (i) “\(6x\)” = “\(4(x + 7)\)” | M1 |
| (ii) \(6x = 4x + 28\) | M1 |
| \(6x - 4x = 28\) oe | M1 |
| 14 | A1 |
| (4) | |
| (6 marks) |
Notes
A1: cao