Question

which of the following pairs of the lines are parallel and which of them are perpendicular to each other X + 2 Y + 5 equal to zero 2 x minus y + 20 equal to zero​

Answer 1

QUESTION

which of the following pairs of the lines are parallel and which of them are perpendicular to each other X + 2 Y + 5 equal to zero 2 x minus y + 20 equal to zero​

ANSWER

Slope of the straight line x+2y+1=0 is m  

1

​  

=−  

coefficientofy

coefficientofx

​  

=−  

2

1

​  

\

Slope of the straight line 2x−y+5=0 is m  

2

​  

=−  

coefficientofy

coefficientofx

​  

=−  

−1

−2

​  

=2

Product of the slopes m  

1

​  

m  

2

​  

=−  

2

1

​  

×2=−1

∴ The two straight lines are perpendicular.

Answer 2

sorry I didn't understand the question Sorryyyyyy