How many pounds of chocolate worth $1.5 a pound must be mixed with 10 pounds of chocolate worth 80 cents a pound to produce a mixture worth $1 a pound?

12=12

Step-by-step explanation:

Let x = pounds of $1.5/lb chocolate needed

(cost of chocolate) / (pounds of chocolate) = cost per pound

1.5x+10*.8/x+10=1

1.5x+8=x+10

.5x=1

x=2

2 LBS needs to be checked:

1.5*2+10*.8/2+10=1

3+8/12=1

12/12=1

12=12

Hope this helps

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:

step-by-step explanation: