Apair of vertical angles has measures (2y+5)° and (4y)° . what is the value of y? a: -5/2 b: -2/5 c: 2/5 d: 5/2

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?

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?