60% of a museum fossils are from the Jurassic period. If the number of fossils from the Jurassic is 15,what’s the total number of fossils at the museum

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

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?

Answer pls man im trying to get out of summer school