Seth bought 18.4 gallons of gasoline for $46.74. what was the unit price of the gasoline? a. $3.96/gallon b. $2.59/gallon c. $2.54/gallon d. $4.08/gallon

One way to make this easier is to write the units.

You have $16.80 / 4 gallons.   That's  $4.20 per gallon, or we can write  4.20 dollars/gallon.

Since you want gallons per dollar, just invert the 4.20:

   N gallons / dollar = (1/N) dollars / gallon:  

   1/ (4.20 dollars/gallon) = 0.2381 gallons / dollar.

I hope this makes sense.

(Sanity) Check:  0.2381 gallons for $1   … That's a little less than one quarter gallon for $1, so if I wanted an entire gallon it would be a little over $4.  Looks reasonable.  

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i