4MA0 Foundation June 2014 Paper 1 Q9
9
(a) Simplify fully
(i) \(4d^2 - 6d^2 + 5d^2\)
(ii) \(7x + 5y - 3x - 8y\)
(3)(b) Solve \(\;6x - 5 = 16\) (2)
| Scheme | Marks |
|---|---|
| (i) \(3d^2\) | B1 |
| (ii) \(4x - 3y\) | B2 |
| (3) |
Notes
B2: B1 for \(4x\) or \(+4x\)
B1 for \(-3y\)
SC: Award B1 for: \(4x - 3y\) followed by an incorrect expression
| Scheme | Marks |
|---|---|
| \(6x = 16 + 5\) or \(6x = 21\) or \((16 + 5) \div 6\) or \(6x - 21 = 0\) or \(-6x - 21 = 0\) | M1 |
| 3.5 oe | A1 |
| (2) | |
| (5 marks) |
Notes
M1: Condone omission of brackets or 16.8(333....)
A1: A1 for 3.5 or \(\dfrac{7}{2}\) or \(\dfrac{21}{6}\) oe