4 times the difference of 12 and 7
is divided by
5.

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?

Find the area of an equilateral triangle with a side of 6 inches

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?