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For positive numbers p and q,
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09 Dec 2018, 13:19
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For positive numbers p and q, \(\frac{p-q}{p+q} = \frac{2}{3}\)
Quantity A
Quantity B
p+q
5
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
Re: For positive numbers p and q,
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09 Dec 2018, 17:09
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Carcass wrote:
For positive numbers p and q, \(\frac{p-q}{p+q} = \frac{2}{3}\)
Quantity A
Quantity B
p+q
5
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
Given:\(\frac{p-q}{p+q} = \frac{2}{3}\) Multiply both sides by (p+q) to get: \(p-q = (\frac{2}{3})(p+q)\) Multiply both sides by 3 to get: \(3(p-q) = (2)(p+q)\) Expand both sides to get: \(3p-3q = 2p+2q\) Subtract 2p from both sides to get: \(p-3q = 2q\) Add 3q to both sides to get: \(p = 5q\)
Now take given quantities and replace p with 5q to get: Quantity A: 5q + q Quantity B: 5
Simplify: Quantity A: 6q Quantity B: 5
Let's TEST some values of q
CASE i: If q = 1/6, then we get: Quantity A: 6(1/6) = 1 Quantity B: 5 In this case, Quantity B is greater
CASE ii: If q = 1, then we get: Quantity A: 6(1) = 6 Quantity B: 5 In this case, Quantity A is greater
Re: For positive numbers p and q,
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25 Jan 2022, 08:07
You can skip the algebra once you understand the concept. We are just looking at a ratio. So it can be less than 5, or much greater than 5, so long as the ratio of 2/3 is maintained.
Re: For positive numbers p and q,
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16 Feb 2023, 02:08
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