Answer: 20 gallons per hour.
Step-by-step explanation:
Let be "x" the average number of gallons that the car used in one hour.
You need to analize the information given in the exercise:
1. The total amount of gallons used by the car was:
[tex]Total\ used=130\ gallons[/tex]
2. The car consumes that amount in [tex]6\frac{1}{2}\ hours[/tex].
So, to convert the mixed number to a decimal number, you must divide the numerator by the denominator of the fraction and add the result to the whole number part. Then:
[tex](6+\frac{1}{2})\ hours=6.5\ hours[/tex]
Set up the following proportion:
[tex]\frac{130}{6.5}=\frac{x}{1}[/tex]
Finally, you must solve for "x" in order to find its value:
[tex]\frac{130}{6.5}=x\\\\x=20[/tex]
