On a roadtrip, the distance driven can be represented by the following equation y=15x where x is the number of gallons of gas. What does 15 represent

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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answer: x=60