Foundation November 2018 Unit 1 Q14
14.
(a) Simplify the expression \(15x - 2y - 7x - 4y\). [2]
(b) Solve the equation \(2m - 7 = 12\). [2]
(c) Calculate the value of \(5f + 3g\) when \(f = -4\) and \(g = 7\). [2]
| Scheme | Marks | Comments |
|---|---|---|
| 8x − 6y or 2(4x – 3y) | B2 | Must be in an expression for B2. B1 for sight of (+)8x or −6y. B1 for 8x + −6y Mark final answer. |
| Scheme | Marks | Comments |
|---|---|---|
| 2m = 19 | B1 | |
| m = 9½ or 19/2 or 9·5 | B1 | FT from 2m = k. Accept m = k/2 (but, if on FT k is even, final answer must be given as a whole number.) B0 for ‘9 rem 1’. Mark final answer. Allow 2 marks for embedded answer BUT only 1 mark if contradicted by m ≠ 9½. |
| Scheme | Marks | Comments |
|---|---|---|
| 1 | B2 | B1 for sight of −20 or sight of (+) 21. But not – 20f (+) 21g. Mark final answer. |