Foundation November 2017 Paper 3 Q8
8
(a) Complete the number machine so that \(\qquad q = 7r - 2\) [2 marks]
(b) Write down the output \(y\) in terms of \(x\). [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| \(\times\, 7\) in first box and –2 in second box and \(q\) in Output | B2 | B1 for any two correct accept \(q = 7r - 2\) in Output |
| Alternative method 2 | ||
| \(-\dfrac{2}{7}\) in first box and \(\times\, 7\) in second box and \(q\) in Output | B2 | B1 for any two correct accept \(q = 7r - 2\) in Output |
Additional guidance
Do not accept \(7r - 2\) alone in Output
Accept \(= q\) in Output
Condone \(7\,\times\) in first box
| Answer | Mark | Comments |
|---|---|---|
| \(3(x + 5)\) | B1 | oe \(3x + 15\) Accept \(y = 3(x + 5)\) or \(y = 3x + 15\) |
Additional guidance
| Ignore further work if attempting to solve eg \(3x + 15 = 0\), \(x = -5\) | B1 |
| Do not ignore further work if attempting to simplify eg \(3x + 15 = 18x\) | B0 |
| (\(y =\)) \(x + 5 \times 3\) | B0 |
| Do not accept \((x + 5)3\) or \(3 \times (x + 5)\) or \((x + 5) \times 3\) or \(x3 + 15\) | B0 |