If 4x = 14 and xy = 1 then y =

Question

A. 56
B. 7/2
C. 2/7
D. 1/5
E. 1.56

surendrasaini1 · Answer

If 4x = 14 and xy = 1 then y =

A. 56
B. 7/2
C. 2/7
D. 1/5
E. 1.56

4x = 14 , x = 14/4

xy = 1, (14/4)* y = 1

y = 4 / 14

Hence y = 2/7

Choice C is correct.

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_shashank_shekhar_ · Answer

4x=14
=>x = 14/4

xy=1
=>y=1/(14/4)
=2/7 (C)

Sanyukta95 · Answer

xy=1
y=1/x....(1)

4x=14
x=14/4=7/2....(2)

From (1)&(2)
y=1/(7/2)=2/7
(C) is the correct answer

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Abhishek009 · Answer

4x = 14

So,  x = \frac{7}{2}

Now,  xy = 1  ; So  \frac{7}{2}*y = 1

Hence,  y = \frac{2}{7}  ; Answer must be (C)

uttam94317 · Answer

xy=1
y=1/x....(1)
From (1)&(2)
y=1/(7/2)=2/7
(C)

ScottTargetTestPrep · Answer

We see that x =14/4 = 7/2.

Thus:

7/2 * y = 1

y = 2/7

Answer: C

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