Bryn is riding his bike at a constant speed from school to the library. His distance from the library in kilometers, x hours after leaving school can be modeled by the equation y = 20 – 12x. What do x, y, 20, and 12 represent in the equation? Be sure to specify units.

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:

answer is because 4×10=40

and 98×4= is 392

40,392