Find the constant variation for xy=12

The expression given to us is:

If we divide both sides by then the above expression can be rewritten as:

Now, we know that 12 is a constant, so the above equality can be changed into a proportionality as:

Thus, we now know that there is an inverse proportionality between and which has a constant of proportionality, also known as the constant of variation to be 12.

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:

answerim :

n

step-by-step explanation:

im not sure but my dad knows