Joy started with 2.75 gallons of milk. She used 1.5 pints to make mashed potatoes and another cup to make cookies. How much milk does joy have left?

Amount of cups Joy has=2.75

1 cup=0.0625 gallons

1 pint=0.125 gallons

amount used to make mashed potatoes:

1.5*0.125=0.1875 gallons

amount used to make cookies=0.0625 gallons

total amount of milk used:

0.0625+0.1875=0.25

Remaining amount

=2.75-0.25=2.5 gallons

Unit conversions:

1 pint = 0.125 gallons

1 cup = 0.0625 gallons

Now,

Total volume of milk = 2.75 gallons

Milk used for mashed potato = 1.5 pints = 1.5*0.125 = 0.1875 gallons

Milk used for cookies = 1 cup = 1*0.0625 = 0.0625 gallons

Milk left = 2.75 - 0.1875 - 0.0625 = 2.5 gallons