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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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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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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

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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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24 Jun 2016, 03:02
2
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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03 Jul 2016, 11:42
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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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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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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
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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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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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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

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

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