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If 2x=4y=z, what is xy, in terms of z?
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16 Oct 2016, 04:41
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If 2x=4y=z, what is xy, in terms of z? A. z/4 B. z/2 C. z D. 2z E. 4z
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Re: If 2x=4y=z, what is xy, in terms of z?
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16 Oct 2016, 05:51
Bunuel wrote: If 2x=4y=z, what is xy, in terms of z?
A. z/4 B. z/2 C. z D. 2z E. 4z 2x=4y=z i.e. x = z/2 and y = z/4 xy = z/2  z/4 = z/4 Answer: Option A
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Re: If 2x=4y=z, what is xy, in terms of z?
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16 Oct 2016, 05:57
Given 2x =4y =z
2x=4y => x = 2y ...(1)
Also, 2x = z or, 2.(2y) = z (Putting value of x from equation 1) or y = z/4 xy = z/4 Option A



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Re: If 2x=4y=z, what is xy, in terms of z?
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16 Oct 2016, 06:14
Another way to solve this is putting numbers in place of x,y,z Try z=8,y=2,x=4 Then, xy = 2 = z/4(Option A)
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Re: If 2x=4y=z, what is xy, in terms of z?
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16 Oct 2016, 10:31
Consider 2x=z; then x=Z/2 and similarly Y=Z/4
XY =Z/2Z/4= 2ZZ/4 =Z/4  Which is option A



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Re: If 2x=4y=z, what is xy, in terms of z?
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16 Oct 2016, 11:39
Bunuel wrote: If 2x=4y=z, what is xy, in terms of z?
A. z/4 B. z/2 C. z D. 2z E. 4z Solve by plugging in some values , a 10 sec approach !!Let , 2x = 4y = z = 8 So, x = 4 , y = 2 and z = 8 Now, x  y = 4  2 =>2 In terms of z it will be \(\frac{8}{4}\) Hence correct answer will be (A) \(\frac{z}{4}\)
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Re: If 2x=4y=z, what is xy, in terms of z?
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24 Oct 2016, 19:51
2x=4y=z
4y=z > y = z/4
2x=z > x = z/2
xy = (z/4)(z/2) = z/4



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Re: If 2x=4y=z, what is xy, in terms of z?
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24 Oct 2016, 21:08
Is this really a 600level question? It's hard for me to tell sometimes.



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Re: If 2x=4y=z, what is xy, in terms of z?
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25 Oct 2016, 16:57
Bunuel wrote: If 2x=4y=z, what is xy, in terms of z?
A. z/4 B. z/2 C. z D. 2z E. 4z Since we have three equal terms we can create two equations. 2x = z x = z/2 4y = z y = z/4 Thus, x  y = z/2  z/4 = 2z/4  z/4 = z/4 Answer: A
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If 2x=4y=z, what is xy, in terms of z?
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24 Sep 2018, 11:23
Abhishek009 wrote: Bunuel wrote: If 2x=4y=z, what is xy, in terms of z?
A. z/4 B. z/2 C. z D. 2z E. 4z Solve by plugging in some values , a 10 sec approach !!Let , 2x = 4y = z = 8 So, x = 4 , y = 2 and z = 8 Now, x  y = 4  2 =>2 In terms of z it will be \(\frac{8}{4}\) Hence correct answer will be (A) \(\frac{z}{4}\)Hi, I don´t really get why if the result of x y is 2, goes after "=" as 4. Is it related to what says about in terms of z ? Could you please your answer by breaking into many pieces?



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Re: If 2x=4y=z, what is xy, in terms of z?
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24 Sep 2018, 11:48
Abhishek009 wrote: Bunuel wrote: If 2x=4y=z, what is xy, in terms of z?
A. z/4 B. z/2 C. z D. 2z E. 4z Solve by plugging in some values , a 10 sec approach !!Let , 2x = 4y = z = 8 So, x = 4 , y = 2 and z = 8 Now, x  y = 4  2 =>2 In terms of z it will be \(\frac{8}{4}\) Hence correct answer will be (A) \(\frac{z}{4}\)Hi, I don´t really get why if the result of x y is 2, goes after "=" as 4. Is it related to what says about in terms of z ? Could you please your answer by breaking into many pieces?




Re: If 2x=4y=z, what is xy, in terms of z?
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24 Sep 2018, 11:48






