Jawaban nomor 17 dong... Minta tlong d jawab....

Kelas 11 Matematika
Bab Program Linear

Kelas utama = x
Kelas ekonomi = y

70x + 30y <= 2.100 ◎ dibagi 10 ◎ 7x + 3y <= 210
7x + 3y = 210 → (0, 70) dan (30, 0)

x + y <= 50 → (0,50) dan (50, 0)
x + y = 50 ◎ dikali 3 ◎ 3x + 3y = 150

7x + 3y = 210
3x + 3y = 150
--------------------- -
4x = 60
x = 15

x + y = 50
15 + y = 50
y = 50 - 15
y = 35

f(x, y) = 250.000x + 175.000y

f(0, 70) = 0 + 175.000 . 70
f(0, 70) = 12.250.000

f(50, 0) = 250.000 . 50 + 0
f(50, 0) = 12.500.000

f(15, 35) = 250.000 . 15 + 175.000 . 35
f(15, 35) = 3.750.000 + 6.125.000
f(15, 35) = 9.875.000

karena x dan y tidak boleh 0, maka, keuntungan maksimum = Rp 9.875.000,00