Question

The lines given by 3x+2ky+2 =0 and 2x+5y+1 =0 are parallel then the value of k is *

-5/4

2/5

3/2

15/4

​

Answer 1

Answer:

3x+2ky+2=0

6x+4ky+4=0

another equation 2x+5y+1=0

6x+15y+3=0

so,4k=15

k=15/4

Answer 2

Answer:

15/4

Step-by-step explanation:

a1=3 , B1=2k

a2=2 ,B2=5

then,

in parallel

a1/a2=B1/B2

3/2=2k/5

2k=(5×3)/2

2k=15/2

k=15/4