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.

To determine how many gallons of gas Marissa should expect to use in total, we need to calculate the gas consumption for both days separately and then add them together.

First, let's calculate the gas consumption for today's drive of 175 miles:

Number of gallons used = (Miles driven) / (Miles per gallon)

Number of gallons used today = 175 miles / 25 miles per gallon
= 7 gallons

Now, let's calculate the gas consumption for tomorrow's drive of 225 miles:

Number of gallons used tomorrow = 225 miles / 25 miles per gallon
= 9 gallons

To find the total number of gallons used, we add up the gas consumption for both days:

Total number of gallons used = Number of gallons used today + Number of gallons used tomorrow
= 7 gallons + 9 gallons
= 16 gallons

Therefore, Marissa should expect to use 16 gallons of gas in total for both days.