1. Express the rate in lowest terms. The ratio of $2.25 to 6.75 ounces. 2. find the average rate of speed, expressed in miles per hour (unite rate). a post office truck delivered mail on a 9-mile route in 2 hours.
3. Does x/2 = 16/4 have the same solution as x/16 = 4/2. Use the cross products property to explain your answer.
4. Solve the proportion. 2x/5 = 9/15.
5. Tell whether the statement is true or false. Explain. If a/b = 2/3, then 3/2 = b/a. Use the cross product property to explain your answer.