Intermediate June 2022 Unit 2 Q7
7.
(a) Expand \(4(3p - 5)\). [1]
(b) Make \(m\) the subject of the formula \(w = 8m - 3\). [2]
(c) Expand and simplify \((y + 5)(y - 4)\). [2]
| Scheme | Marks | Comments |
|---|---|---|
| \(12p - 20\) | B1 | Must be an expression. Mark final answer. |
| Scheme | Marks | Comments |
|---|---|---|
| \(8m = w + 3\) or \(w + 3 = 8m\) or \(-8m = -w - 3\) | B1 | Allow \(-8m = -(w + 3)\). |
| \(m = \dfrac{w + 3}{8}\) or \(\dfrac{w + 3}{8} = m\) or \(m = \dfrac{-w - 3}{-8}\) | B1 | FT only from \(\pm 8m = \pm w \pm 3\), stated or implied. (note: \(8m = w + 3\) or \(-8m = -w - 3\) will have already gained the previous B1). B1B0 for \(-\,m = \dfrac{-3 - w}{8}\) or equivalent. Mark final answer. Note Allow B1B0 for \(m = (w + 3) \div 8\) with or without brackets. Allow B1B0 for \(\dfrac{w + 3}{8}\) (‘\(m =\)’ missing). |
| Scheme | Marks | Comments |
|---|---|---|
| \(y^2 + y - 20\) ISW | B2 | Allow \(y^2 + 1y - 20\). Award B1 for one of the following:
|