SOLUTION: If (x − 7)(y + 7) < 0, then which of the following must be true?
A. x > 7 B. y < −7 C. x < 7 D. y > −7 E. None of these.
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Question 286362: If (x − 7)(y + 7) < 0, then which of the following must be true?
A. x > 7 B. y < −7 C. x < 7 D. y > −7 E. None of these.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
If , then either (ie is negative) or (ie is negative), but not both. If they are both negative, then the result is positive. Also, if they're both positive, then the product is positive.
So if , then which is choice C)
and if , then which is is choice B)
So the answers are B and C (if you're allowed multiple answers), but not at the same time. If you aren't allowed multiple answers, then there's a typo somewhere.
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