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If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^

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If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post Updated on: 06 Sep 2018, 11:39
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If \(x = \frac{-5}{8}\) and \(y = \frac{-1}{2}\),what is the value of the expression \(-2x - y^2\)?

A. \(-\frac{3}{2}\)

B. ‒1

C. 1

D. \(\frac{3}{2}\)

E. \(\frac{7}{4}\)

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Originally posted by Bunuel on 23 Jun 2016, 11:44.
Last edited by carcass on 06 Sep 2018, 11:39, edited 1 time in total.
Edited by Carcass
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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 23 Jun 2016, 11:55
AbdurRakib wrote:
If x=\(\frac{-5}{8}\) and y=\(\frac{-1}{2}\),what is the value of the expression -2x-\(y^2\)?
A. \(\frac{-3}{2}\)
B. ‒1
C. 1
D. \(\frac{3}{2}\)

E. \(\frac{7}{4}\)


OG Q 2017(Book Question: 19)


\(-2x\) \(-\) \(y^2\)

= \(-2(\frac{-5}{8})\) \(-\) \((-1/2)^2\)

= \(\frac{5}{4}\) \(-\) \(\frac{1}{4}\)

= 1

Answer will be (C)

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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 24 Jun 2016, 03:02
1
x = -5/8
y = -1/2
Value of the expression -2x - y^2 = -2 (-5/8) - (-1/2)^2
= 10/8 - (1/4)
= 5/4 - 1/4
= 5-1 / 4
= 4/4 = 1 (C) .. Answer is C...

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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 03 Jul 2016, 11:42

7. Algebra



For more check Ultimate GMAT Quantitative Megathread

Hope it helps.
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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 03 Jul 2016, 11:44
-2X- y^2
-2x-5/8 - (1/2)^2
5/4-1/4
1

C correct


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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 05 Jul 2016, 03:13
x = -5/8 and y = -1/2

==> -2(-5/8) - (1/2)^2 = 5/4 - 1/4 = 1

Ans: C :lol:
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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 12 Apr 2017, 23:12
Bunuel wrote:
If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^2?

A) -3/2
B) -1
C) 1
D) 3/2
E) 7/4



Replacing x with \(x=-\cfrac { 5 }{ 8 }\) and y with\(y=-\cfrac { 1 }{ 2 }\) in the expression given:

\(-2x-{ y }^{ 2 }=\\ -2\left( -\cfrac { 5 }{ 8 } \right) -{ \left( -\cfrac { 1 }{ 2 } \right) }^{ 2 }=\\ \cfrac { 5 }{ 4 } -\cfrac { 1 }{ 4 } =\\ \cfrac { 4 }{ 4 } =\\ 1\)
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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 31 May 2018, 16:09
Bunuel wrote:
If x = -5/8 and y = -1/2,what is the value of the expression -2x - y^2?

A. \(-\frac{3}{2}\)

B. ‒1

C. 1

D. \(\frac{3}{2}\)

E. \(\frac{7}{4}\)


Substituting the given values into the expression, we have:

-2(-5/8) - (-1/2)^2

10/8 - 1/4 = 5/4 - 1/4 = 4/4 = 1

Answer: C
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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^  [#permalink]

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New post 06 Sep 2018, 09:25
\(-2(\frac{-5}{8})-(\frac{-1}{2})^2\)
\(\frac{10}{8}-\frac{1}{4}\)
\(\frac{8}{8}\)
\(1\)

Answer C
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Re: If x = -5/8 and y = -1/2, what is the value of the expression -2x – y^ &nbs [#permalink] 06 Sep 2018, 09:25
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