Wes rode his bike 30 miles in 3 hours. what was his average rate of speed? 0.3 mph 10 mph 30 mph 90 mph

Answer this question! 30 points and brainliest!

What is the value of x in the diagram below?

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?