8. Sue has 100 dimes and quarters. If the total value of the coins is $21.40, how many of each kind of coin does she have?

24 dimes and 76 quarters.

Step-by-step explanation:

24 X 0.10 = $2.40

76 X 0.25 = $19

$2.40 + $19 = $21.40

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:

b.my answer is b.

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