Foundation January 2022 Paper 2R Q15
15
(a) Solve \(5c = 15\) (1)
(b) Expand \(x(8 - x)\) (1)
\(T = 5m - 6n\)
(c) Work out the value of \(T\) when \(m = 4.2\) and \(n = -2.5\) (2)
(d) Make \(g\) the subject of \(k = 2g + t\) (2)
| Scheme | Marks |
|---|---|
| 3 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| \(8x - x^2\) | B1 |
| (1) |
Notes
B1: or \(-x^2 + 8x\)
| Scheme | Marks |
|---|---|
| 5 × 4.2 – 6 × −2.5 or 21 − − 15 or 21 + 15 oe | M1 |
| 36 | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| \(k - t = 2g\) or \(\dfrac{k}{2} = g + \dfrac{t}{2}\) or \(\dfrac{k - t}{2}\) | M1 |
| \(g = \dfrac{k - t}{2}\) | A1 |
| (2) | |
| (6 marks) |
Notes
M1: for isolating terms in \(g\) or for correctly dividing by 2.
A1: oe e.g. \(g = \dfrac{k}{2} - \dfrac{t}{2}\)