A recipe for strawberry punch calls for 3/7 qt of ginger ale and 1/7 qt of strawberry soda. How much liquid is needed? If the recipe is doubled, how much is needed?
If the recipe is halved, how much is needed?

4.7 qt of liquid is needed. If doubled, 8/7 qts of liquid is needed. if halved, 2/7 qts of liquid is needed.

Step-by-step explanation:

Add the two amounts of liquid to get the total amount of liquid:

1/7 qt + 3/7 qt = 4/7 qt (cannot be simplified further)

To double the recipe, multiply the total liquid amount by 2.

4/7 * 2/1 = 8/7

To half the recipe, multiply the total liquid amount by 1/2.

4/7 * 1/2 = 4/14 --> 2/7

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: