Question

Help me please 25 points

Answer 1

C= 68

Explanation:

We see that C grows bigger, as x and y grows bigger. So we want x to be as large as possible. But by the second constraint, x can at most be 5. So we choose

x=5

Now we use x=5 and the fourth constraint to find y

4*x-y
`\geq` 1

4*5-y
`\geq` 1

-y
`\geq` 1-4*5

y
`\leq` 19

Thus, y can at most be 19.

So for x=5, y=19,

C=6*5+2*19 = 30 + 38 = 68