Question

OMG BULLY ON OPEN STUDY HELPPP!!!!!

sorry for the title I just need your attention...
Which is a solution of the equation?

2x – y = 0

A.
(1, 2)

B.
(3, –1)

C.
(2, –4)

D.
3

Answer 1

this is linear equations, and inequalites (spell check)

Answer 2

medal go 2 to the right one

Answer 3

i have more btw

Answer 4

Is it the kind of attention you want, though? ;[

Anyways, if you have a solution to an equation, it can be substituted into the equation to give some sort of obviously true equality: like 5 = 5, you can't really say 5 stopped being 5.
Like for (1, 2) A,
2x - y = 0
We could put x=1 and y=2 as with the points.
2(1) - (2) = 0
Does this turn out to 0 = 0 when computed?

Answer 5

@AccessDenied um what does "computed" mean

Answer 6

Same as calculate... like you multiply everything out 2(1) = 2 and then do the subtraction, the end result.

Answer 7

ok is it 1,2??????????

Answer 8

Yes.

This one is easier, the answer was put first.
If it hadn't been, say B(3, -1) came before it... this is an example where it does not work:
2(-1) - (3) = 0
-2 - 3 = 0
-5 = 0 <-- Now you'd never say these entities were the same. So B is not the answer.