42
It is 18.
The answer depends on the feasible region and there is no information on which to determine that.
2x+2y
It is 18.
It would depend on the feasible region.
maximum value of 6y+10y
42
(6x)(5y)
The answer obviously depends on what the boundaries of the feasibility region are.
78
Since there is no feasible region defined, there is no answer possible.
It is 18.
The answer depends on the feasible region and there is no information on which to determine that.
2x+2y
If we knew the values of 'x' and 'y', and the boundaries of the feasible region, we could answer that question quickly and easily.
It is 18.