Question

The value of k for which the lines 6x+7y=4 and 24x + 28y = k coincide is (a) 16 (b) 25 (c) 7 (d) 12​

Answer 1

Answer:

A) 16

Step-by-step explanation:

1.For the lines a1x+b1y +c1=0 and a2x+b2y+c2=0 to be coincident the lines must satisfy the following condition

a1/a2=b1/b2=c1/c2

2.6x+7y=4 and 24x + 28y = k

Hence 6/24=7/28=4/k

Therefore k=16