Question

Please help? Will give medal!
Determine which system below will produce infinitely many solutions.
A. -4x + 6y = 20
4x - 3y = -2

B. -2x + 4y = 18
4x - 8y = -36

C. 3x - 2y = 5
-6x - 4y = -10

D. 5x - 3y = 12
15x - 9y = 24
I chose C, is that right?

Answer 1

Is it because it's a fraction?

Answer 2

It's not C

Answer 3

B is x=-7 and y=1

Answer 4

and D is x=0 and y=-4

Answer 5

First, please ask yourself: What does a system of linear equations with infinitely many solutions look like?

Answer 6

You can't divide by 0, so I'm leaning towards B

Answer 7

@mathmale

Answer 8

Option B includes two equations. Is one of them a constant multiple of the other? If yes, then this system of linear equations has infinitely many solutions.