Question

Determina si las rectas r1: y=1/2x -5 y r2: y= -2x + 7 son paralelas, perpendiculares o se cortan oblicuamente

Answer 1

x-1/-3-1=y+3/-11-3  

x-1/-4=y+3/-14  

-14x+14=-4y-12  

-14+26=-4y  

14/4x-26/4=y  

7/2x-13/2=y  

recta r2  

x-3/-1-3=y-13/5-13  

x-3/-4=y-13/-8  

-8x+24=-4y+52  

-8x+24-52=-4y  

-8x-28=-4y  

2x+7=y  

r1 es oblicua a r2.