In 1967, a 30-second super bowl commercial cost $40,099. in 2000, a 30-second commercial cost $1,800,000. what was the percent of change in the cost of a commercial? show your work on how you got the answer

Step-by-step explanation:

($1,800,000 - $40,000)/$40,000*100

($1,760,000)/$40,000*100

44*100

4400% change

($1,800,000 - $40,000)/$40,000*100

($1,760,000)/$40,000*100

44*100

4400% change  

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: