bantuin dong, nomer 5&6 pake caranya yg komplit hehe buat bsk nih

jawab

5.
garis melalui (0,48) dan (48,0)
x + y = 48 ....(i)
garis melalui (0,72) dan (24,0)
3x + y = 72 ...(ii)


titik potong (i) dan (ii)
3x + y = 72
x + y = 48 ......(-)
2x = 24
x= 12
y = 36

f(x.y) = 200x + 150y
f(12,36) = 200(12) + 150(36) = 7.800


6.  f(x,y)= 3x + y

f(A) = 3(0) + 2 = 2
f(B)= 3(2) + 3 = 9
f(C) = 3(5) + 2 = 17
f(D) = 3(6) + 0 = 18
maksimum di D