Answer:
a= 1/2m+25
Step-by-step explanation:
As the statement says that Sophie pays for one half of the cost of the car rental (m) and that she spent $25 on gasoline, the expression that could be used to determine the amount that she spent would be equal to the sum of one half of the cost of the car rental plus 25:
a= 1/2m+25
a= amount Sophie spent
m= cost of the car rental