6 for 2 refills. Since its less money and you still get refills.
6.25 because 2.5+2.5= 5 and then half of 2.5 is 1.25 so 6.25
Helen subtracted 17 from the right side of the equation when she should have added 17. Adding 17 to both sides would have gotten x/y by itself.
The answer is 'Helen should have added 17 to both sides of the equation'.
Step-by-step explanation:
One gallon = 25 miles
8 gallon= 25×8 miles= 200 miles