A right triangle has legs of 28 and 42. The length of the hypotenuse is

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?

Sum is 17 and their difference is 3

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x