George is making a 8 gallons of Tropical trip punch. He has already poured in 1 3/4 gal of pineapple juice and 2 1/2 gal of orange juice. The only other ingredient is 7-up. How much 7-up does George need?

Respuesta :

first you have to subtract them and then you need to add them and then you need to subtract those two answers to find out the correct answer