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Which ordered pair makes the equation true: 2x – 8y = –4, (–6, 1), (–1, 4), (1, 4), (6, 2)?

Answer 1

(6 ,2)

In order to determine which pair makes the equation true, we must first substitute each ordered pair into it one at a time, looking for the evaluation on the left to equal - 4 on the right.

#•(color(red)(-6),color(blue)(1))to2(color(red)(-6))-8(color(blue)(1))=-12-8=-20≠-4#

#•(color(red)(-1),color(blue)(4))to2(color(red)(-1))-8(color(blue)(4))=-2-32=-34≠-4#

#•(color(red)(1),color(blue)(4))to2(color(red)(1))-8(color(blue)(4))=2-32=-30≠-4#

#•(color(red)(6),color(blue)(2))to2(color(red)(6))-8(color(blue)(2))=12-16=-4" this is true"#

The only pair that make the equation true is (6 ,2)

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Answer 2

Isaiah Anthony

The ordered pair that makes the equation true is (-1, 4).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.