4400 Higher November 2008 Paper 4 Q6
6
(a) Multiply out \(5(x - 2)\) (2)
(b) Solve the equation \(\dfrac{x}{4} + 3 = 10\)
You must show sufficient working. (2)
You must show sufficient working. (2)
(c) Solve the inequality \(5x - 6 \gt 2\)
You must show sufficient working. (2)
You must show sufficient working. (2)
| Scheme | Marks |
|---|---|
| \(5x - 10\) | B2 |
| (2) |
Notes
B2: B1 for \(5x\) or \(5 \times x\); B1 for \(-10\) or \(+ -10\)
ignore “\(x = 2\)” but subseq incorrect wking: −B1
| Scheme | Marks |
|---|---|
| \(\frac{x}{4} = 10 - 3\) or \(x + 4 \times 3 = 4 \times 10\) | M1 |
| 28 | A1 |
| (2) |
Notes
M1: oe
| Scheme | Marks |
|---|---|
| \(5x \gt 8\) | M1 |
| \(x \gt 1.6\) | A1 |
| (2) | |
| (6 marks) |
Notes
M1: condone “=” only if ans “\(x \gt 1.6\)”
A1: “\(x \gt 1.6\)” but just “\(\gt 1.6\)” on line: M1 A1
“\(x \gt 1.6\)” but “1.6” or “\(x = 1.6\)” on line: M1 A0
allow \(\geqslant\)