Write a word phrase for the algebraic expression 3x-7?

Can someone me out here and the tell me the greatest common factor

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?