Solve 2x^2+8x-1=0 can someone type this "correctly" in photo math for me please?

Drag the files to the correct boxes to complete the pairs. match each percent amount to its correct value 15% of 30 30% of 45 60% of 7 23% of 20 2019 edmentum. all nghts reserved

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

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?