Kristin and Jill are selling fruit for a school fundraiser Customers can buy small boxes of grapefruit and large boxes of grapefruit. Kristin sold 3 small boxes of grapefruit and 9 large

boxes of grapefruit for a total of $99. Jill sold 12 small boxes of grapefruit and 10 large boxes of

grapefruit for a total of $162. How much does one small box of grapefruit cost?

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:

$9.41

step-by-step explanation:

- (2, -7)

- lines r and s and lines t and u must be parallel