Solve the problem fully writing out all your steps to the problem in the space below as shown in the instructions y = -3x + 4
-8x - 2y = -8

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?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Twelve less than a number is at most 20