Question

Find b, so that the line through (b,-3) and(-5, 1) is perpendicular to the line joining (4, 5) and(0, -2)

Answer 1

hey mate here is ur answer

if lines are perpendicular

then product of slopes is -1.

m1=-2-5/0-4 = -7/-4 =7/4.

m2=1-(-3)/-5-b

m2=4/-5-b

7/4 × 4/-(5+b)=-1

7/4=5+b/4

5+b=7

b=2.

hope it helps.

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