Question

8. If the lines representing 3x – y+ 8 = 0 and 9x - ky + 24 = 0
are coincident, then the value of k is​

Answer 1

Answer:

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Step-by-step explanation:

a1 = 3 A2=9

b1= -1 b2=k

C1=8 C2= 24

a1/a2 = b1/b2=c1/c2

3/9=-1/k=8/24

1/2=-1/k=1/3

by invertendo

2/1=k/-1=3/1

k/-1=3-2/1

k/-1=1/1

k=1(-1)

k=-1

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Answer 2

Step-by-step explanation:

a1 = 3a2 = 9

b1 = -1 b2 = k

c1 = 8 c2 =b1 / b2 = c1 / c2

3/9 =- 1/k =8 / 24

1/2= 1k = 1/3

by in vertendo

2/1 = k/-1 = 3/1

k/-1 = 3-2 /1

k/-1=1/1

k=1 (-1)

k=-1