How many solutions exist for the system y = 2x + 5 and y = -0.2x - 4?
A. no solution
B. one solution
C. infinitely many solutions

Question

How many solutions exist for the system y = 2x + 5 and y = -0.2x - 4?
	A.	no solution
	B.	one solution
	C.	infinitely many solutions

turingtest · Answer

$$y=2x+5$$$$y=-0.2x-4$$multiply the second equation by ten$$y=2x+5$$$$y=-2x-40$$add them together and see if you get a statement that is always true, never true, or a single answer.
If it is always true, infinite solutions.
If it is never true, no solutions.
If it yields an answer, that is the 1 solution.

turingtest · Answer

$$10y=-2x-40$$supposed to be in las line

anonymous · Answer

If it is always true, infinite solutions.
If it is never true, no solutions.
If it yields an answer, that is the 1 solution.

I don't understand :(

anonymous · Answer

I think we have B.	one solution in here.

anonymous · Answer

Oh got it Turing :)

anonymous · Answer

It was rather an elementary approach :)

turingtest · Answer

... you can try to figure it out is always my response. It may be enlightening$$\large y=2x+5$$$$\large 10y=-2x-40$$add 'em up.

anonymous · Answer

You mean if it's an identity then no solutions right?

turingtest · Answer

:/
yeah, that makes perfect sense...

anonymous · Answer

lol, why that face? :)

turingtest · Answer

Your sarcastic witicisms try to confound me. It almost works at times ;)

anonymous · Answer

thanks for the help :D

anonymous · Answer

Hehe, I can never  to do that to you ;)