Can someone me with this problem : ((

Dilations map circles to circles and ellipses to ellipses with the same. true or false

What is the quotient of -3/8and-1/3?

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?