Use row reduction to find the inverse of the given matrix if it exists, and check your answer by multiplication. (If the inverse doesn't exist, enter DNE in any cell of the matrix.) 0 1 1 1

The triangles are similar. what is the value of x? show your work.

896.31 cm= km 100cm = 1m 1000m = 1km a) 0.0089631 b) 0.0089631 c) 8.9631 d) 89.631

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?