2 If using the method of completing the square to solve the quadratic equation x- + 2x + 16 = 0, which number would have to be added to "complete the square"? ​

Yo y do yall have 2 stars that means yall wrong bro

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?

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula