stephiejo21402 stephiejo21402
  • 10-12-2014
  • Mathematics
contestada

find y when x=9 if y varies directly as x, and y=245 when x=7

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V1C70R V1C70R
  • 10-12-2014
Since y varies directly as x, you know that y=245 and x=7 can be used as a proportion, 245/7.  When you multiply this proportion to 9, you get 315.  This is the value of y when x=9.  

y=315
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