Rubin is 5 years older than one-third of Terry’s age. Sheldon is three years younger than 2 times Rubin’s age. Define a variable and write an expression to represent Rubin’s age. Then find Rubin's age and Sheldon's age if Terry is 6 years old.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Percent increase and decrease. original number: 45 new number: 18

Look at the chart showing the results of a baseball player at bat. which is the probability of getting a hit?