how many solutions do these equations have
y=2x+5
y=-0.2x-4

Question

how many solutions do these equations have
y=2x+5
y=-0.2x-4

dumbsearch2 · Answer

Have you done the first step?

dumbsearch2 · Answer

To start, find the y value at the place they intersect, therefore as y=2x + 5 and y=-0.2x -4 they intersect when the right hand of the equations are equal to each other.

terenzreignz · Answer

Or you could just note that they have different slopes. :D

anonymous · Answer

To find solutions to equations:
Equate both solutions together:
y=2x+5
y=-0.2x-4

i.e.
2x + 5 = -0.2x - 4

Make x the subject of the equation, and solve for x.
Solve for y after by subbing the value of x into any of those y = equations.

anonymous · Answer

both of the equations are STRAIGHT LINES
how many possible ways could 2 straight lines cross?
Clearly only 1, unless both lines were exactly the same (which in this case they aren't)