4MA0 Foundation January 2013 Paper 1 Q12
12
(a) \(W = 3x + 4y\)
Work out the value of \(W\) when \(x = 2\) and \(y = 6\) (2)
Work out the value of \(W\) when \(x = 2\) and \(y = 6\) (2)
(b) Simplify
(i) \(m \times n \times 7\)
(ii) \(\dfrac{12y^4}{2}\)
(iii) \(7g - 10h + 2g + 4h\)
(4)(c) Multiply out \(\quad 3(2t - 4)\) (1)
| Scheme | Marks |
|---|---|
| \(3 \times 2 + 4 \times 6\) | M1 |
| 30 | A1 |
| (2) |
Notes
M1: M1 for \(3 \times 2\) and \(4 \times 6\) or 6 and 24
| Scheme | Marks |
|---|---|
| (i) \(7mn\) (oe) | B1 |
| (ii) \(6y^4\) | B1 |
| (iii) \(9g - 6h\) | B2 |
| (4) |
Notes
B1: no × signs
B2: B2 fully correct final answer.
B1 for \(9g\) or \(-6h\)
| Scheme | Marks |
|---|---|
| \(6t - 12\) | B1 |
| (1) |
Notes
B1: accept \(6 \times t\) for \(6t\)