4MA0 Foundation January 2018 Paper 2 Q15
15 Mike buys \(c\) pens and \(r\) rulers.
Each pen costs 24 cents.
Each ruler costs 37 cents.
Mike spends a total of \(T\) cents buying pens and rulers.
Write down a formula for \(T\) in terms of \(c\) and \(r\).
(3)
| Scheme | Marks |
|---|---|
| \(T = 24c + 37r\) | B3 |
| (3) |
Notes
B3: for a correct final answer
(award B2 if \(T = 24c + 37r\) is incorrectly simplified)
If not B3 then
B2 for \(T = 24c + kr\) or \(T = kc + 37r\) (\(k\) may be 0) or \(24c + 37r\)
B1 for \(24c\) or \(37r\) or \(T\) = (linear expression in \(c\) and \(r\) eg \(T = c + r\) but not \(T = cr\))