Foundation November 2016 Unit 2 Q12
12.
(a) Solve the equation \(3x - 2 = 10\). [2]
(b) A number machine is shown below.
Calculate the OUTPUT when the INPUT is −2. [1]
| INPUT | ⟶ | ADD 5 | ⟶ | MULTIPLY BY 7 | ⟶ | OUTPUT |
(c) Expand \(2(x + 3)\). [1]
| Scheme | Marks | Comments |
|---|---|---|
| \(3x = 12\) | B1 | |
| \(x = 4\) | B1 | F.T. from 3x = k. x = 12/3 is B1B0 Allow an embedded answer. Mark final answer. |
| Scheme | Marks | Comments |
|---|---|---|
| 21 | B1 |
| Scheme | Marks | Comments |
|---|---|---|
| 2x + 6 | B1 |