MAtH
posted by SuSan .
marIsSA's cAR gEtS An aVERagE Of 25 mIlEs pER gALlON oF GAs. she PLAns tO DrIVe 175 MILeS TOdAy and 225 Miles TOmOrrow. hOW ManY gAllOnS of gAs sHoUlD SHe ExPeCt To uSe iN All.

16 gallons. add 175 and 225 together and divide them by 25.