West Los Angeles College Linear Equations & Mixture Problems

Question Description

1. How much of a 67% antifreeze solution must be added to 42 gallons of a 19% solution to obtain a 50% antifreeze solution?

2. 55 gallons of a 28% acid solution are mixed with 40 gallons of a 80% acid solution. What is the acid concentration of the resulting mixture?

Round to the nearest percent.

3. How much of pure (100%) orange juice must be added to 23 gallons of a 27% orange juice solution to obtain a 62% orange juice solution?

4. 28 gallons of a 55% peroxide solution are mixed with how many gallons of pure water (no peroxide) to obtain 18% peroxide solution?

5. A grocer mixes 19 pounds of peanuts selling for 3 $LaTeX: displaystyle frac{hbox{ dollars}}{hbox{pound}}$ $dollars$ pound with 10 pounds of almonds selling for 7 $LaTeX: displaystyle frac{hbox{ dollars}}{hbox{pound}}$ $dollars$ pound. What is the price of the mixture in $LaTeX: displaystyle frac{hbox{ dollars}}{hbox{pound}}$ $dollars$ pound?

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