4b^2 + 3.5a − 2b + 3.5b^2 − a show steps

7.5b² + 2.5a - 2b

collecting like terms

(4b² + 3.5b²) +(3.5a - a) - 2b

= 7.5b² + 2.5a - 2b

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:

pls refer ro the top for answer