1. Use the Cross Products Property to solve the proportion for $n$: $$\frac{n}{9} = \frac{4}{3}$$The value of $n$ is ___.
2. Which equation correctly represents the application of the Cross Products Property to the proportion $$\frac{7}{x} = \frac{14}{10}$$?
3. A paint mixture requires 3 parts blue for every 7 parts yellow. To maintain the same color ratio, how many parts of blue paint are needed for a batch using 21 parts of yellow paint? ___ parts
4. Solve the proportion for $a$: $$\frac{a-3}{5} = \frac{9}{15}$$ The value of $a$ is ___.
5. Using the Cross Products Property, solve the proportion for the variable $x$: $$\frac{x+1}{3} = \frac{x+7}{5}$$
6. A car travels 180 miles on 5 gallons of gasoline. What is the car's fuel efficiency as a unit rate? The unit rate is ___ miles per gallon.
7. A 12-ounce bottle of shampoo costs 4.80 dollars. A larger, 20-ounce bottle costs 7.00 dollars. Which bottle is the better value?
8. If you earn 68 dollars for 4 hours of babysitting, what is your hourly wage? Your unit rate of pay is ___ dollars per hour.
9. A grocery store sells a 5-pack of granola bars for 4.50 dollars and a 12-pack for 10.20 dollars. Which option has a lower unit price?
10. A printer can print 210 pages in 6 minutes. What is the printer's speed as a unit rate? The printer's speed is ___ pages per minute.