Answer:
C= 68
Step-by-step 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 1
4*5-y 1
-y 1-4*5
y 19
Thus, y can at most be 19.
So for x=5, y=19,
C=6*5+2*19 = 30 + 38 = 68
x^2-72=12x
(0,0)
For the x coordinate it is at 0 and for the y it is also at 0.
y=6
200
Steps
6.6 x 10^{-2}/3.3 x 10-4
10^{-2}-4(-4) x 6.6/3.3
10^{-2} x 6.6 = 660/3.3
=200