Which polynomial is in standard form?

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?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Which inequality has a dashed boundary line when graphed ?