Higher November 2019 Paper 1 Q12
12 \(T = \dfrac{q}{2} + 5\)
Here is Spencer’s method to make \(q\) the subject of the formula.
\(2 \times T = q + 5\)
\(q = 2T - 5\)
What mistake did Spencer make in the first line of his method? (1)
| Answer | Mark | Mark scheme |
|---|---|---|
| Mistake identified | C1 | for a correct mistake identified Acceptable examples all three terms should be multiplied by 2 and not just two of them the 5 should be multiplied by 2 it should be \(2 \times T = q + 2 \times 5\) should subtract 5 first (before multiplying by 2) Not acceptable examples Should remove the 5 first \(2 \times T\) should be \(2T\) should have got rid of the denominator |
Additional guidance
Accept answers showing a correct first step