Question

if the lines given by 2x+2ky=2and 2x+5y+1=0vare parallel, then the value of k is

options are:
a. -5/4.
b. 2/5
c. 5/2
d.-3/2.


plz answer fast​

Answer 1

Answer:

c. 5/2

Step-by-step explanation:

Since both the lines are parallel, their slopes will be same.

For 2x + 5y +1 =0,

5y=-2x-1

y=(-2/5)x -(1/5), Comparing this with equation of line y=mx+c, slope is -2/5

Now for 2x+2ky=2

x+ky=1

ky=-x+1

y=(-1/k)x +(1/k)

here slope is -1/k.

Since both the slopes are equal,

-1/k = -2/5

k=5/2

Cheers!

Answer 2

Answer:

Step-by-step explanation: