Find an Equation of Variation in Which the Following Are $y$

question 177

Multiple Choice

Find an equation of variation in which the following are true.
- $y$ varies jointly as $x$ and $z$ and inversely as the product of $w$ and $p$ , and $y = \frac { 45 } { 80 }$ when $x = 5 , z = 9 , w = 8$ , and $\mathrm { p } = 5 .$

• A) \(y = \frac { 2 x z } { w p }\)
• B) \(y = \frac { w p } { 2 x z }\)
• C) \(y = \frac { 2 w p } { x z }\)
• D) \(y = \frac { x z } { 2 w p }\)

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