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For f(x ,y)= 7x +9y, what is the valu...

For `f(x ,y)= 7x +9y`, what is the value of `f(x,y)` when `y =((5)/(x))^(2) and x=3 `?

A

`(68)/(3)`

B

`(214 )/(9)`

C

`36`

D

`46`

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The correct Answer is:
D
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