Answer:
29 gallons
Step-by-step explanation:
Jacks car used 18 gallons of gasoline to go 468 miles.
we have to calculate the amount of gasoline would be used to go 754 miles.
∵ 18 gallons of gasoline were used to travel = 468 miles
∴ 1 gallon of gasoline were used to travel = 
= 26 miles
∴ to cover the distance of 754 miles gasoline would be used = 
= 29 gallons of gasoline
29 gallons of gasoline would be used to go 754 miles.