Question 12 A recipe for 20 rolls requires 5 tablespoons of butter. How many tablespoons of butter are
needed for 3 rolls?​

answer : is 0.6 Tablespoon

step : 20 rolls = 5 tablespoon

5 rolls = 1 tablespoon

1tablespoon ÷ 5 rolls = 0.2 Tablespoon

0.2 x 3 Rolls = 0.6 Tablespoon

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: