Let angle a =40.if angle b is complement of angle a, and angle c is a supplement of angle b, what is angle b + angle c

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

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?

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?