z varies directly as x√ and inversely as y. If z=116 when x=36 and y=3, find z if x=49 and y=9. (Round off your answer to the nearest hundredth.)

Respuesta :

The value of z to the nearest hundredth is 45.11.

Direct variation is expressed using this equation : x = ky

Indirect variation is expressed using this equation: x = k/y

Where:

  • x = dependent variable
  • k = constant
  • y = independent variable

The information in the question can be represented with this equation: z = k√x / y

116 = k√36 / 3

116 = 6k / 3

116 = 2k

k = 116/2

k = 58

In order to determine the value of y, these steps would be taken:

58√49 / 9

(58 x 7) / 9

= 406 / 9

= 45.11

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