About 102.5625... I think
<span>A system of equations has infinitely many solutions when the two
lines representing the equations coincide. i.e. the two equations are
the same or a multiple of each other.
2y - 4x = 6
2y = 4x + 6
2y = 2(2x + 3)
y = 2x + 3
-y = -(2x + 3)
-y = -2x - 3
Hence the other equation is -y = -2x - 3</span>
Answer: you can listen radio signal during 5h
Step-by-step explanation: t =d/v=2xradius÷velocity=2x100miles ÷ 40mile/h = 5h