Over the last 80 years, the average annual u. s. inflation rate was about
a. 3.6 percent, implying that prices have increased 16-fold.
b. 4 percent, implying that prices have increased 17-fold.
c. 4 percent, implying that prices have increased 16-fold.
d. 3.6 percent, implying that prices increased about 17-fold.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: