Foundation November 2019 Unit 2 Q17
17.
(a) Solve the following equation. [3]\[4(3x + 2) = 12\]
(b) Write down an expression for the total cost of 3 bananas at \(x\) pence each, and 5 apples at \(2x\) pence each.
Simplify your answer. [3]
Simplify your answer. [3]
| Scheme | Marks | Comments |
|---|---|---|
| F.T. until 2nd error. Adding ‘unlike terms’ eg 12x + 8 = 20x or 3x + 2 = 5x to be taken as two errors. | ||
| \(12x + 8 = 12\) OR \(3x + 2 = 3\) | B1 | |
| \(12x = 4\) OR \(3x = 1\) | B1 | |
| \(x = \dfrac{4}{12}\) OR \(x = \dfrac{1}{3}\) | B1 | Mark final answer. Allow 0·33(33...) A final answer of 0·3 is (B1B1)B0. |
| Scheme | Marks | Comments |
|---|---|---|
| \(3x + 10x\) | B2 | B1 for \(3x + 5 \times 2x\) OR for sight of \(10x\) |
| \(13x\) (pence) | B1 | Mark final answer. |