What is the sum of frothy-three thousand and twenty-one hundreds?

Carter drank 15.75 gallons of water in 4 weeks. he drank the same amount of water each day.a. estimate how many gallons he drank in one day.b. estimate how many gallons he drank in one week.c. about how many days altogether will it take him to drink 20 gallons?

Triangle xyz has vertices x(1,3), y(0,0)

Solve 3x-18=2y and 5x-6y=6 by elimination show work