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What must be added to (x + y)/2 to obtain (x - y)/2? A. y B. x C. 2
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24 May 2022, 16:08
24 May 2022, 16:08
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What must be added to \(\frac{x + y}{2}\) to obtain \(\frac{x - y}{2}\)?
A. –y
B. –x
C. 2y
D. 2x
E. y – x
A. –y
B. –x
C. 2y
D. 2x
E. y – x
Part of the project: GRE QCQ & PS 3 Questions Every One DAILY Challenge - (2022)
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GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
Re: What must be added to (x + y)/2 to obtain (x - y)/2? A. y B. x C. 2
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25 May 2022, 03:07
25 May 2022, 03:07
1
(x+y)/2 + (N) = (x-y)/2
N = (x-y)/2 - (x+y)/2 OR -2y/2 OR -y
Answer is (A)
N = (x-y)/2 - (x+y)/2 OR -2y/2 OR -y
Answer is (A)
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Re: What must be added to (x + y)/2 to obtain (x - y)/2? A. y B. x C. 2
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25 May 2022, 05:26
25 May 2022, 05:26
1
Carcass wrote:
What must be added to \(\frac{x + y}{2}\) to obtain \(\frac{x - y}{2}\)?
A. –y
B. –x
C. 2y
D. 2x
E. y – x
A. –y
B. –x
C. 2y
D. 2x
E. y – x
TIP: If the wording of a question is confusing, and you're not sure what mathematical operation is required, ask yourself an easier question.
For example, for this question, we might ask "What must be added to 2 to obtain 5?"
The answer to this easier question = 5 - 2
This means the answer to the original question \(= \frac{x - y}{2} - \frac{x + y}{2}\)
\(= \frac{(x - y) - (x + y) }{2}\)
\(= \frac{-2y}{2}\)
\(= -y\)
Answer: A
