In march, derrick had $28.20 in credit card debt. he recorded the amount as -$28.20 in his account book. in april, he had 45 the amount of credit card debt that he had in march. how did he record his amount of debt in april in his account book?

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:

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation: