Foundation June 2019 Paper 2 Q20
20 The diagram shows two intersecting straight lines.
Not to scale
Find the value of \(y\). [6]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 125 nfww | 6 | B3 for \(x = 35\) or B1 for \(x + 20 = 3x - 50\) M1 for \(\pm 2x = k\) or \(kx = \pm 70\) (\(k \ne 0\)) AND M1 for their \(x + 20\) or \(3 \times\) their \(x - 50\) M1dep for \(y = 180 - (\)their \(x + 20)\) oe If 0 scored SC1 for \(x + 20 + 3x - 50 + y + y = 360\) or better or \(3x - 50 + y = 180\) or \(x + 20 + y = 180\) | eg \(y = \dfrac{360 - 2 \times \text{their } 55}{2}\) Dependent on the previous M1 |