M4egaDemaiyabellyc M4egaDemaiyabellyc

29-04-2017
Mathematics

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Roger's birthday party will cost $15 if he invites 3 guests. if there are 4 guests, how much will roger's birthday party cost? assume the relationship is directly proportional.

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egenriether egenriether

29-04-2017

The cost per guest is $15/3=$5
So 4*$5=$20

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