Math Help - Questions part 3

1. Questions part 3

7) How much tea costing $8 per pound should be mixed with 3 pounds of tea costing$5 per pound to get a mixture costing $6 per pound? 8) How many liters of water must evaporate from 40 liters of a 10% salt solution to make a 25% salt solution? 9) A candy shop has chocolate pieces that cost$2.50 per pound and caramel pieces that cost $1 per pound. How many pounds of each should be combined to get 20 pounds of a mixture worth$2 per pound?

2. Originally Posted by gobbluth
7) How much tea costing $8 per pound should be mixed with 3 pounds of tea costing$5 per pound to get a mixture costing $6 per pound? 8) How many liters of water must evaporate from 40 liters of a 10% salt solution to make a 25% salt solution? 9) A candy shop has chocolate pieces that cost$2.50 per pound and caramel pieces that cost $1 per pound. How many pounds of each should be combined to get 20 pounds of a mixture worth$2 per pound?
These are all "mixture" exercises, and they work just like the others of this sort in another of your threads. Use the set-up explained there. If you get stuck, please reply showing how far you have gotten.

Thank you!