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If .002x + .004y = 4, what is the value of y in terms of x?
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03 Apr 2017, 03:53
03 Apr 2017, 03:53
Expert Reply
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Question Stats:
91% (00:57) correct
8% (03:12) wrong based on 23 sessions
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If .002x + .004y = 4, what is the value of y in terms of x?
A. \(\frac{4 -2x}{0.04}\)
B. \(\frac{4000 - 0.002x}{0.04}\)
C. \(4 -0.5x\)
D. \(1000 - .5x\)
E. \(2(1000 -x)\)
A. \(\frac{4 -2x}{0.04}\)
B. \(\frac{4000 - 0.002x}{0.04}\)
C. \(4 -0.5x\)
D. \(1000 - .5x\)
E. \(2(1000 -x)\)
Drill 3
Question: 8
Page: 319
Question: 8
Page: 319
Re: If .002x + .004y = 4, what is the value of y in terms of x?
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17 Apr 2017, 09:30
17 Apr 2017, 09:30
Expert Reply
Explanation
We could use algebra here, but most likely you won’t wind up with an answer that looks anything like choice (D). Instead, try plugging in a value for x. Make x something easy such as 1000, which makes y = 500. Plug x = 1000 into each answer choice, and it turns out that only choice D gives you the correct value of 500.
Hence option D is correct!
We could use algebra here, but most likely you won’t wind up with an answer that looks anything like choice (D). Instead, try plugging in a value for x. Make x something easy such as 1000, which makes y = 500. Plug x = 1000 into each answer choice, and it turns out that only choice D gives you the correct value of 500.
Hence option D is correct!
gmatclubot
Re: If .002x + .004y = 4, what is the value of y in terms of x? [#permalink]
17 Apr 2017, 09:30
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