Home › ECZ Grade 12 School Certificate › Mathematics › Linear programming › A profit is described by P equals 5x plus 8y. Wh…
A profit is described by P equals 5x plus 8y. What is the profit when x is 4 and y is 6?
AIt is 68
BIt is 58
CIt is 78
DIt is 48
Answer & Solution
Correct answer: A. It is 68
1. The equation that is to be made as large as possible is the objective function.
2. Substitute the given values into it one term at a time.
3. Five times 4 is 20.
4. Eight times 6 is 48.
5. Adding the two terms gives 20 plus 48, which is 68.
6. Answering 48 uses only the second term and drops the first one.
_Source: Siyavula Mathematics Grade 11 (Everything Maths, CC BY 4.0), Chapter 12: Linear programming_