Invisible lines!
What do you call equations describing two or more lines
No the only time that a system of equations would have no solutions is when the two equations have the same slope but different y-intercepts which would mean that they are parallel lines. However, if they have different slopes and different y-intercepts than the solution would be where the two lines intersect.
2 sets of Parallel lines
Horizontal : y = 0Vertical: x = -2.
They don't, they are parallel to each other.
If you refer to linear equations, graphed as straight lines, two inconsistent equations would result in two parallel lines.
In a dependent system of equations, the lines represented by the equations are identical; they overlap completely. This means that every point on one line is also a point on the other line. As a result, the lines appear as a single line on the graph, indicating infinitely many solutions.
The two equations represent the same straight line.
Without any equality signs the given terms can't be considered to be equations.
If you mean 3x+2y = -5 and -2x+3y = -5 then they are straight line equations
Then they are simultaneous equations.
What do you call equations describing two or more lines
They are simultaneous equations.
That they, along with the equations, are invisible!
If you mean: x+y = 10 and x-y = 6 then y = -x+10 and y = x+6 which means the lines are perpendicular to each other
Its called Simultaneous Equations
All the lines meet at one point: a single solution. All the lines are the same: infinitely many solutions. At least one of the lines does not pass through the point of intersection of the others: no solution.