Teacher/User Name: DEMO Name:__________________________ Practice Problems Period: ________ Date: ____________

### Solve:

1) How many pounds of coffee worth \$3.30 a pound should be mixed with 70 pounds of coffee worth \$2.30 a pound do produce a mixture worth \$2.60 a pound?

2) A gas station owner has 40 gallons of gasoline worth \$1.30 per gallon and some worth \$2.30 per gallon. How many gallons of the \$2.30 brand must the owner mix in to produce gasoline that costs \$1.80 per gallon?
3) A 10 kg nut mixture that is 50% peanuts is combined with 10 kg of an 70% peanut mixture. What percent of the new mixture is peanuts?

4) How many pounds of coffee worth \$2.50 a pound should be mixed with 80 pounds of coffee worth \$1.70 a pound do produce a mixture worth \$1.86 a pound?
5) A certain liquid is 96% water. Some of the water evaporates, leaving a liquid that is 95% water. How much of the water evaporated?

6) A 2 kg nut mixture that is 50% peanuts is combined with 38 kg of an 70% peanut mixture. What percent of the new mixture is peanuts?