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4p + 5q = 7

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4p + 5q = 7 [#permalink] New post 27 Aug 2016, 03:20
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Question Stats:

66% (03:38) correct 33% (00:07) wrong based on 3 sessions
\(4p + 5q = 7\)



Quantity A
Quantity B
12 + 15q
20


A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given
[Reveal] Spoiler: OA

Last edited by Carcass on 30 Nov 2017, 03:16, edited 4 times in total.
Edited by Carcass
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Re: Given an expression... [#permalink] New post 27 Aug 2016, 03:21
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According to me answer should be D........But don't know why it is wrong
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Re: Given an expression... [#permalink] New post 27 Aug 2016, 03:26
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Agreed with Sonalika. D it is
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Re: Given an expression... [#permalink] New post 27 Aug 2016, 05:52
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Expert's post
Sonalika42 wrote:
According to me answer should be D........But don't know why it is wrong


Are you certain that Quantity A is 12 + 15q not "12p + 15q".

If so then the answer is D.
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Re: Given an expression... [#permalink] New post 27 Aug 2016, 07:32
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yes i am sure
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Re: 4p + 5q = 7 [#permalink] New post 30 Nov 2017, 03:13
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Answer is D bcoz there is no necessary info. about the value of x and y.
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Re: 4p + 5q = 7 [#permalink] New post 30 Nov 2017, 03:16
Expert's post
Edited the OA.

regards
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Re: 4p + 5q = 7 [#permalink] New post 30 Nov 2017, 13:45
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Expert's post
Sonalika42 wrote:
\(4p + 5q = 7\)



Quantity A
Quantity B
12 + 15q
20



Given: 4p + 5q = 7
Multiply both sides by 3 to get the EQUIVALENT equation: 12p + 15q = 21
Subtract 12p from both sides to get: 15q = 21 - 12p

Now onto the question!!
Quantity A: 12 + 15q
Quantity B: 20

Replace 15q with 21 - 12p to get:
Quantity A: 12 + (21 - 12p)
Quantity B: 20

Simplify to get:
Quantity A: 33 - 12p
Quantity B: 20

Subtract 33 from both sides to get:
Quantity A: -12p
Quantity B: -13

Let's test some values
If p = 0, then we get:
Quantity A: -12(0) = 0
Quantity B: -13
Quantity A is greater

If p = 2, then we get:
Quantity A: -12(2) = -24
Quantity B: -13
Quantity B is greater

Answer: D

Cheers,
Brent
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Brent Hanneson – Creator of greenlighttestprep.com
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Re: 4p + 5q = 7   [#permalink] 30 Nov 2017, 13:45
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4p + 5q = 7

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