Intermediate November 2021 Unit 1 Q7
7. \(AB\) and \(CD\) are parallel.

Diagram not drawn to scale
Calculate the value of \(x\). [3]
| Scheme | Marks | Comments |
|---|---|---|
| 4x + 5 = 57 or equivalent | M1 | |
| 4x = 52 | A1 | |
| x = 13 | A1 | FT from 4x = k. Accept x = k/4 (but, if on FT k is a multiple of 4, final answer must be given as a whole number.) M1A1A0 for ‘x = 52/4’ Mark final answer. Allow (M1)A1A1 for a correct embedded answer BUT only (M1)A1A0 if contradicted by x ≠ 13. |