First, divide the total pounds of food eaten by 7 (7 days in a week).
2,100/7 = 300 pounds
Then divide this quotient by the 5 hippos.
300/5 = 60 pounds
Therefore, each hippo eats 60 pounds of food every day.
Louis = x
Jane = 2x (Twice as many as Louis)
Together they have 360
x + 2x = 360
3x= 360
x=120
2(120)= 240
Jane addresses 240 envelopes