Tolong jawabannya kak please besok dikumpulkan

jawab
garis melalui (0,10), (5,0)  --> 2x + y = 10
garis melalui (0,5),(15,0)---> x + 3y = 15

titik potong"
2x + y = 10 ...||kali3
x + 3y = 15

6x + 3y = 30
x + 3y = 15 ....(-)
5x = 15
x = 3
dan y = 4
titik potong(3,4)

nilai  fungsi objekti
f(x,y) = 2x + 5y
f(0,5) = 0 + 5(5) = 25
f(5,0)= 2(5) + 0 = 10
f(3,4) = 2(3) + 5(4) = 26
maks = 16