Question

The value of p for which graphs of 2x + py = 7 and 4x + 2y = 14 are coincident
(a) 1
(b) 2
(c) 7
(d) none​

Answer 1

Answer:

2x +py= 7

4x+2y=14

a=2. b=p. c=-7

A=4. B=2 C=-14

2/4=1/2

-7/-14=1/2

p/2=1/2

p=1