You need a 65% alcohol solution. On hand, you have a 180 mL of a 5% alcohol mixture. You also have 95% alcohol mixture. How much of the 95% mixture will you need to add to obtain the desired solution? You will need  ____________________ mL of the 95% solution

Solve each problem. Diluting solutions How much water should be added to 20 ounces of a 15 solution of alcohol to dilute it to a 10 solution?

Alison has three times as many dimes as quarters in her purse. She has $9.35 altogether. How many coins of each type does she have?

Mixing a concentrate Travis is going to wash his car. The directions on the bottle of car wash concentrate say to mix 2 ounces of concentrate with 15 ounces of water. If Travis puts 6 ounces of concentrate in a bucket, how much water must he mix with the concentrate?

Solve each problem. Mixing solutions How many gallons of a 5 alcohol solution must be mixed with 90 gallons of 1 solution to obtain a 2 solution?

Due to the drought in California, many communities have tiered water rates. There are different rates for Conservation Usage, Normal Usage and Excessive Usage. The usage is measured in the number of hundred cubic feet (hcf) the property owner uses. During the winter, a property owner will pay $24.72 plus $1.54 per hcf for Normal Usage. The bill for Normal Usage would be between or equal to $49.36 and $86.32. How many hcf will he be allowed to use if he wants his usage to stay in the normal range?