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

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

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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1
why dont you teach her how to get the answers herself?
almost seems like you are doing her homework for her.

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@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.
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
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 :)

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