(1) x = 2
(2) 10x = 24 – 4y
Can someone please help me understand why the answer is [spoiler]B / (2)? 10x = 24 - 4y can just break down to be 5x + 2y = 12, so how is making an equating with 2 variables equal to the exact equation make it sufficient? [/spoiler]
Thanks in advance!
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Does 5x + 2y = 12 ?
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iwant700plus
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This is a Yes/No question.
1) X=2, temptation is to plug 2 into the equation, but the question is asking us whether 5x+2y=12. We don't know the value of y, so could be Yes or No depending on value of Y. Insufficient.
2) 10X=24-4Y --> 5x+2y=12. This tells us a definite YES. Sufficient.
Ans. B.
1) X=2, temptation is to plug 2 into the equation, but the question is asking us whether 5x+2y=12. We don't know the value of y, so could be Yes or No depending on value of Y. Insufficient.
2) 10X=24-4Y --> 5x+2y=12. This tells us a definite YES. Sufficient.
Ans. B.
Ahhh, yes, the accursed Yes/No DS questions. Thanks for the explanation, iwant700plus. I guess I overlooked that in my quizzing.
To answer your question, hemantsood, I got this question from a Kaplan online quiz. They are randomly assigned, so there's no real number assigned to it. Hope that helps...
To answer your question, hemantsood, I got this question from a Kaplan online quiz. They are randomly assigned, so there's no real number assigned to it. Hope that helps...
