How many solutions exist for the system y = 2x + 5 and y = -0.2x - 4?

Question

anonymous · Answer

1

anonymous · Answer

why dont you teach her how to get the answers herself?

anonymous · Answer

almost seems like you are doing her homework for her.

anonymous · Answer

@shortie, because these equations are straight lines, are not a multiple of each other and have different gradients, there can only be one solution.

If there were multiples they are the same line and have infinite solutions.

If they had the same gradient they would be parallel lines and have no solutions.

anonymous · Answer

Straight lines ----

Gradient-Intercept Form: y=mx+c  where m is gradient, c is y-intercept
Standard Form: ay+bx+c=0  where a and b are constants

anonymous · Answer

Thanks Zed, just hate when people type an answer in a study group and not explain themselves. People should come here to learn, not have someone do their homework for them :)