Ted, a supermarket employee, approached 50 random customers and asked whether they would be willing to discuss what they liked most about the store. He interviewed the 20 who said yes. Is this a random sample of the supermarket's customers?

Let w=23 . what is the value of w + 45 ?

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?

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?