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lara31 [8.8K]
4 years ago
14

Use slopes and y-intercepts to determine if the lines y=5x+5 and 5x−y=−5 are parallel.

Mathematics
1 answer:
GalinKa [24]4 years ago
7 0

Answer: They are not parallel, they are coincident

Step-by-step explanation:

If two lines have the same slope but a different y-intercept, the lines are parallel. If two lines have the same slope and the same y-intercept, the lines are coincident.

We can rewrite 5x−y=−5 adding -5x to both sides and multiplying by -1:

5x - y =-5

5x - y -5x = -5 - 5x (adding -5x to both sides)

-y = -5 - 5x

Multiplying by -1

y = 5x + 5

Both equations look the same so they are coincident. They have the same intercept y=5 and the same slope m=5.

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