Foundation November 2020 Paper 3 Q18
18 Bobbi has these notes.
| Note | Number of notes |
|---|---|
| £5 | 3 |
| £10 | \(x\) |
The total value of her notes is £\(T\)
Write a formula for \(T\) in terms of \(x\). [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(10 \times x\) or \(10x\) | M1 | oe |
| \(T = 15 + 10x\) | A1 | oe eg \(T = 10x + 15\) allow \(T = 15 + 10 \times x\) |
Additional guidance
| Condone \(x10\) for \(10x\) for M mark | |
| Ignore units | |
| \(15 + 10x = T\) | M1A1 |
| Condone a correct rearrangement after \(T = 15 + 10x\) seen eg \(T - 15 = 10x\) or \(x = \dfrac{T - 15}{10}\) | M1A1 |
| Do not ignore further incorrect working eg \(T = 15 + 10x\) and \(T = 25x\) | M1A0 |
| \(T = 5 \times 3 + 10 \times x\) | M1A0 |
| \(15 + 10x\) | M1A0 |