Stephanie spent $46.20 on 12 gallons of gasoline. What was the price per gallon?

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Florence price's brownies and more sells all types of cookies and pastries. on tuesdays, they markdown all brownies 75% to a sale of $1.50 a dozen. find the selling price and the markdown of a dozen brownies.

If you answer 2+2 you will get over 80 points