eyebee eyebee
  • 15-05-2017
  • Mathematics
contestada

You can buy 3 post cards for $5.40 , 6 post cards for $10.80 or 9 postcards for $16.20.What is the constant of proportionality for buying post cards?

Respuesta :

yguo0818
yguo0818 yguo0818
  • 15-05-2017
the answer should be buy 1 postcard is  $1.80
Answer Link
AnnabethChase139
AnnabethChase139 AnnabethChase139
  • 15-05-2017
1 post card is $1.80.
Answer Link

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