Question

Nomor 19 beserta caranya

Answer 1

Rumusnya : y -y1=m(x-x1)
diket: y1=3
m = -2/5
x = 1
Jawaban :
y - 3 = -2/5 (x-1)
y - 3 = -2/5x + 2/5
y = -2/5x + 2/5 + 3
5y= -2x +2 +3
5y= -2x + 5
lalu ubah ke bentuk ax+by+c=0
2x + 5y - 5 = 0
a = 2
b = 5
c = -5
a + b -c
2 + 5 - (-5)= 12
Jawabannya: a. 12