7.5 gallons. (5x60)/40 5x60 being the equation to find the total miles driven
The value of the digit is 2 because the value of the 3 is 30 (tens) and if you go one place down you are in the ones
So, in order, you have to multiply first. 3x3=9, now you have to do 2+2=4. Since there is a "plus" in between "2+2" and "3x3" you have to add, 9+4=13.
Nick : 12, 24, 36,48,60,72,..... 180
Victoria: 20, 40, 60,80....180
Boris: 18,36,54,.....180
they will be together on day 180
good luck